diff --git a/contracts/lists/OrderedList.sol b/contracts/drafts/lists/OrderedList.sol
similarity index 100%
rename from contracts/lists/OrderedList.sol
rename to contracts/drafts/lists/OrderedList.sol
diff --git a/contracts/drafts/lists/README-OrderedList.md b/contracts/drafts/lists/README-OrderedList.md
new file mode 100644
index 0000000..390dac5
--- /dev/null
+++ b/contracts/drafts/lists/README-OrderedList.md
@@ -0,0 +1,35 @@
+# Lists
+
+This is an Ethereum project that implements an ordered doubly linked list (https://en.wikipedia.org/wiki/Linked_list).
+
+# Terminology
+Object: Objects are linked to each other and together they are a Linked List
+Head: The first object in the list. No other object points to the head.
+Tail: The last object in the list. The tail points to no other object.
+Data: In this contract the data is an Ethereum address, which can be used for any purpose.
+
+# Implementation
+Solidity doesn't support recursive type references, as in:
+```
+struct Object {
+    Object nextObject;
+}
+```
+This renders a traditional implementation of Linked Lists impossible. In this implementation all Objects are given an id and stored in a mapping instead. This results in an extra inefficiency of doing an extra mapping lookup when following a link between objects.
+
+## Usage
+
+`OrderedList.sol`: Doubly Linked List, sorted by `rank` descending from the head.
+* constructor: Creates an empty list.
+* `function get(uint256 _id)`: Retrieves the Object denoted by `_id`.
+* `function findRank(uint256 _rank)`: Return the id of the first Object with a lower or equal `_rank`, starting from the head.
+* `function insert(uint256 _rank, address _data)`: Insert a new Object immediately before the one with the closest lower `_rank`.
+* `function remove(uint256 _id)`: Remove the Object denoted by `_id` from the List.
+* `function _addHead(address _data)`: Insert a new Object as the new Head with `_data` in the data field.
+* `function _addTail(address _data)`: Insert a new Object as the new Tail with `_data` in the data field.
+* `function _insertAfter(uint256 _prevId, address _data)`: Insert a new Object after the Object denoted by `_id` with `_data` in the data field.
+* `function _insertBefore(uint256 _nextId, address _data)`: Insert a new Object before the Object denoted by `_id` with `_data` in the data field.
+* `function _setHead(uint256 _id)`: Internal function to update the Head pointer.
+* `function _createObject(address _data)`: Internal function to create an unlinked Object.
+* `function _link(uint256 _prevId, uint256 _nextId)`: Internal function to link an Object to another.
+
diff --git a/contracts/lists/mocks/OrderedListMock.sol b/contracts/drafts/lists/mocks/OrderedListMock.sol
similarity index 100%
rename from contracts/lists/mocks/OrderedListMock.sol
rename to contracts/drafts/lists/mocks/OrderedListMock.sol
diff --git a/contracts/lists/README.md b/contracts/lists/README.md
index 81c5b7d..aeb94e9 100644
--- a/contracts/lists/README.md
+++ b/contracts/lists/README.md
@@ -47,17 +47,3 @@ This renders a traditional implementation of Linked Lists impossible. In this im
 * `function _createObject(address _data)`: Internal function to create an unlinked Object.
 * `function _link(uint256 _prevId, uint256 _nextId)`: Internal function to link an Object to another.
 
-`OrderedList.sol`: Doubly Linked List, sorted by `rank` descending from the head.
-* constructor: Creates an empty list.
-* `function get(uint256 _id)`: Retrieves the Object denoted by `_id`.
-* `function findRank(uint256 _rank)`: Return the id of the first Object with a lower or equal `_rank`, starting from the head.
-* `function insert(uint256 _rank, address _data)`: Insert a new Object immediately before the one with the closest lower `_rank`.
-* `function remove(uint256 _id)`: Remove the Object denoted by `_id` from the List.
-* `function _addHead(address _data)`: Insert a new Object as the new Head with `_data` in the data field.
-* `function _addTail(address _data)`: Insert a new Object as the new Tail with `_data` in the data field.
-* `function _insertAfter(uint256 _prevId, address _data)`: Insert a new Object after the Object denoted by `_id` with `_data` in the data field.
-* `function _insertBefore(uint256 _nextId, address _data)`: Insert a new Object before the Object denoted by `_id` with `_data` in the data field.
-* `function _setHead(uint256 _id)`: Internal function to update the Head pointer.
-* `function _createObject(address _data)`: Internal function to create an unlinked Object.
-* `function _link(uint256 _prevId, uint256 _nextId)`: Internal function to link an Object to another.
-
diff --git a/package.json b/package.json
index 3de4732..9b2af02 100644
--- a/package.json
+++ b/package.json
@@ -42,9 +42,10 @@
         "@types/bignumber.js": "5.0.0",
         "@types/chai": "4.2.7",
         "@types/mocha": "5.2.7",
-        "@types/node": "13.1.4",
+        "@types/node": "13.1.6",
         "bignumber.js": "9.0.0",
         "chai": "4.2.0",
+        "chai-bn": "0.2.0",
         "coveralls": "3.0.9",
         "cross-env": "6.0.3",
         "directory-tree": "2.2.4",
@@ -61,11 +62,11 @@
         "node-emoji": "1.10.0",
         "pdf-from-html": "0.1.1",
         "soldoc": "0.1.2-beta.6",
-        "solidity-coverage": "0.7.0",
+        "solidity-coverage": "0.7.1",
         "truffle": "5.1.7",
         "truffle-typings": "1.0.8",
         "ts-generator": "0.0.8",
-        "ts-node": "8.5.4",
+        "ts-node": "8.6.0",
         "tslint": "5.20.1",
         "typechain": "1.0.3",
         "typechain-target-truffle": "1.0.2",
diff --git a/test/drafts/exchange/UniswapExchange.test.ts b/test/drafts/exchange/UniswapExchange.test.ts
index fc2a049..8dd9152 100644
--- a/test/drafts/exchange/UniswapExchange.test.ts
+++ b/test/drafts/exchange/UniswapExchange.test.ts
@@ -1,4 +1,6 @@
-import BigNumber from 'bignumber.js';
+import chai = require('chai');
+// tslint:disable-next-line:no-var-requires
+const { balance, BN, constants, ether, expectEvent, expectRevert, send } = require('@openzeppelin/test-helpers');
 import { TestERC20MintableInstance } from '../../../types/truffle-contracts';
 import { UniswapExchangeInstance, UniswapFactoryInstance } from '../../../types/truffle-contracts';
 
@@ -8,14 +10,9 @@ const UniswapExchange = artifacts.require('./exchange/UniswapExchange.sol') as T
 const UniswapFactory = artifacts.require('./exchange/UniswapFactory.sol') as Truffle.Contract<UniswapFactoryInstance>;
 // tslint:enable:max-line-length
 
-// tslint:disable:no-var-requires
-const chai = require('chai');
-const girino = require('girino');
-// tslint:enable:no-var-requires
-
-const { expect } = chai;
-
-chai.use(girino);
+// tslint:disable-next-line:no-var-requires
+chai.use(require('chai-bn')(require('bn.js')));
+chai.should();
 
 /** @test {UniswapExchange} contract */
 contract('UniswapExchange - Initialization', (accounts) => {
@@ -34,14 +31,14 @@ contract('UniswapExchange - Initialization', (accounts) => {
         uniswapExchange = await UniswapExchange.at(
             (await uniswapFactory.launchExchange(token.address)).logs[0].args.exchange,
         );
-        await token.mint(initialiser1, new BigNumber(1e18));
-        await token.approve(uniswapExchange.address, new BigNumber(1e18), { from: initialiser1 });
+        await token.mint(initialiser1, ether('1'));
+        await token.approve(uniswapExchange.address, ether('1'), { from: initialiser1 });
         await uniswapExchange.initializeExchange.sendTransaction(
-            new BigNumber(1e18),
-            { from: initialiser1, value: (new BigNumber(1e18)).toString() },
+            ether('1'),
+            { from: initialiser1, value: ether('1').toString() },
         );
-        assert.equal((await token.balanceOf(uniswapExchange.address)).toString(), (new BigNumber(1e18)).toString(), 'Token amount not transferred correctly.');
-        assert.equal((await web3.eth.getBalance(uniswapExchange.address)).toString(), (new BigNumber(1e18)).toString(), 'Ether not transferred correctly.');
+        (await web3.eth.getBalance(uniswapExchange.address)).should.be.bignumber.equal(ether('1'));
+        new BN((await token.balanceOf(uniswapExchange.address)).toString()).should.be.bignumber.equal(ether('1'));
     });
 });
 
@@ -61,11 +58,11 @@ contract('UniswapExchange - Trades', (accounts) => {
         uniswapExchange = await UniswapExchange.at(
             (await uniswapFactory.launchExchange(token.address)).logs[0].args.exchange,
         );
-        await token.mint(initialiser1, new BigNumber(1e18));
-        await token.approve(uniswapExchange.address, new BigNumber(1e18), { from: initialiser1 });
+        await token.mint(initialiser1, ether('1'));
+        await token.approve(uniswapExchange.address, ether('1'), { from: initialiser1 });
         await uniswapExchange.initializeExchange.sendTransaction(
-            new BigNumber(1e18),
-            { from: initialiser1, value: (new BigNumber(1e18)).toString() },
+            ether('1'),
+            { from: initialiser1, value: ether('1').toString() },
         );
     });
 
@@ -74,19 +71,19 @@ contract('UniswapExchange - Trades', (accounts) => {
      */
     it('Ether to token swap', async () => {
         const timeout = Math.floor((new Date().getTime()) / 1000) + 3600;
-        const minTokens = new BigNumber(3e17);
-        expect(
-            uniswapExchange.ethToTokenSwap.sendTransaction(
+        const minTokens = new BN('3e17');
+        expectEvent(
+            await uniswapExchange.ethToTokenSwap.sendTransaction(
                 minTokens,
                 timeout,
-                { from: swapper, value: (new BigNumber(5e17)).toString() },
+                { from: swapper, value: (new BN('5e17')).toString() },
             ),
-        ).to.emit(
             'EthToTokenPurchase',
-        ).withArgs(
-            swapper,
-            (new BigNumber(5e17)).toString(),
-            (await token.balanceOf(swapper)),
+            {
+                buyer: swapper,
+                ethIn: new BN('5e17'),
+                tokensOut: await token.balanceOf(swapper),
+            },
         );
     });
 
@@ -95,12 +92,19 @@ contract('UniswapExchange - Trades', (accounts) => {
      */
     it('Token to ether swap', async () => {
         const timeout = Math.floor((new Date().getTime()) / 1000) + 3600;
-        const tokenAmount = new BigNumber(5e17);
-        const minEth = new BigNumber(3e17);
+        const tokenAmount = ether('0.5');
+        const minEth = ether('0.3');
         token.mint(swapper, tokenAmount);
         token.approve(uniswapExchange.address, tokenAmount, { from: swapper });
-        const balanceBefore = await web3.eth.getBalance(swapper);
-        expect(uniswapExchange.tokenToEthSwap(tokenAmount, minEth, timeout, { from: swapper })).to.emit('TokenToEthPurchase');
+        const swap = await uniswapExchange.tokenToEthSwap(tokenAmount, minEth, timeout, { from: swapper });
+        expectEvent(
+            swap,
+            'TokenToEthPurchase',
+            {
+                buyer: swapper,
+                tokensIn: tokenAmount,
+            },
+        );
     });
 
     /**
@@ -112,27 +116,40 @@ contract('UniswapExchange - Trades', (accounts) => {
         const uniswapExchange2 = await UniswapExchange.at(
             (await uniswapFactory.launchExchange(token2.address)).logs[0].args.exchange,
         );
-        await token2.mint(initialiser2, new BigNumber(1e18));
-        await token2.approve(uniswapExchange2.address, new BigNumber(1e18), { from: initialiser2 });
+        await token2.mint(initialiser2, ether('1'));
+        await token2.approve(uniswapExchange2.address, ether('1'), { from: initialiser2 });
         await uniswapExchange2.initializeExchange.sendTransaction(
-            new BigNumber(1e18),
-            { from: initialiser2, value: (new BigNumber(1e18)).toString() },
+            ether('1'),
+            { from: initialiser2, value: (ether('1')).toString() },
         );
         // Swap tokens
         const timeout = Math.floor((new Date().getTime()) / 1000) + 3600;
-        const tokenAmount = new BigNumber(5e17);
-        const minEth = new BigNumber(2e17);
+        const tokenAmount = ether('0.5');
+        const minEth = ether('0.2');
         token.mint(swapper, tokenAmount);
         token.approve(uniswapExchange.address, tokenAmount, { from: swapper });
-        expect(
-            uniswapExchange.tokenToTokenSwap(
-                token2.address,
-                tokenAmount,
-                minEth,
-                timeout,
-                { from: swapper },
-            ),
-        ).to.emit('TokenToEthPurchase').to.emit('EthToTokenPurchase');
+        const swap = await uniswapExchange.tokenToTokenSwap(
+            token2.address,
+            tokenAmount,
+            minEth,
+            timeout,
+            { from: swapper },
+        );
+        expectEvent(
+            swap,
+            'TokenToEthPurchase',
+            {
+                buyer: swapper,
+                tokensIn: tokenAmount,
+            },
+        );
+        expectEvent(
+            swap,
+            'EthToTokenPurchase',
+            {
+                buyer: uniswapExchange.address,
+                tokensOut: await token2.balanceOf(swapper),
+            },
+        );
     });
 });
-
diff --git a/test/lists/OrderedList.test.ts b/test/drafts/lists/OrderedList.test.ts
similarity index 99%
rename from test/lists/OrderedList.test.ts
rename to test/drafts/lists/OrderedList.test.ts
index e35e9b1..c591402 100644
--- a/test/lists/OrderedList.test.ts
+++ b/test/drafts/lists/OrderedList.test.ts
@@ -1,8 +1,8 @@
 import { should } from 'chai';
-import { OrderedListMockInstance } from '../../types/truffle-contracts';
+import { OrderedListMockInstance } from '../../../types/truffle-contracts';
 
 const OrderedList = artifacts
-    .require('./lists/mocks/OrderedListMock.sol') as Truffle.Contract<OrderedListMockInstance>;
+    .require('./drafts/lists/mocks/OrderedListMock.sol') as Truffle.Contract<OrderedListMockInstance>;
 should();
 
 const emptyData = '0x0000000000000000000000000000000000000000';
diff --git a/yarn.lock b/yarn.lock
index 156f575..4cf3865 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -34,9 +34,9 @@
     "@ethersproject/strings" ">=5.0.0-beta.130"
 
 "@ethersproject/address@>=5.0.0-beta.128":
-  version "5.0.0-beta.133"
-  resolved "https://registry.yarnpkg.com/@ethersproject/address/-/address-5.0.0-beta.133.tgz#b6bf2c298da5701c61038e4cdfac2e0038b884ce"
-  integrity sha512-7SjGhZ3xClqlmzqNNzESKlHbBeEzDWXIeKUBbSzK3Ce9PgK6uboiNe53fgqzhrRVOMhD1J4Q+oIm4DsTv37FWg==
+  version "5.0.0-beta.134"
+  resolved "https://registry.yarnpkg.com/@ethersproject/address/-/address-5.0.0-beta.134.tgz#9c1790c87b763dc547ac12e2dbc9fa78d0799a71"
+  integrity sha512-FHhUVJTUIg2pXvOOhIt8sB1cQbcwrzZKzf9CPV7JM1auli20nGoYhyMFYGK7u++GXzTMJduIkU1OwlIBupewDw==
   dependencies:
     "@ethersproject/bignumber" ">=5.0.0-beta.130"
     "@ethersproject/bytes" ">=5.0.0-beta.129"
@@ -63,9 +63,9 @@
     "@ethersproject/logger" ">=5.0.0-beta.129"
 
 "@ethersproject/constants@>=5.0.0-beta.128":
-  version "5.0.0-beta.132"
-  resolved "https://registry.yarnpkg.com/@ethersproject/constants/-/constants-5.0.0-beta.132.tgz#068cc97493fbc1543299bda79e0e726310e129a4"
-  integrity sha512-ioO7Ez8Xatk5z3lVzzEhRjXng1le1sTzfuD3v8gUozrzgLXyl0X81Go1Nadj7qPgo68HziIFcm5kRFp4SdJa0A==
+  version "5.0.0-beta.133"
+  resolved "https://registry.yarnpkg.com/@ethersproject/constants/-/constants-5.0.0-beta.133.tgz#af4ccd7232f3ed73aebe066a695ede32c497a394"
+  integrity sha512-VCTpk3AF00mlWQw1vg+fI6qCo0qO5EVWK574t4HNBKW6X748jc9UJPryKUz9JgZ64ZQupyLM92wHilsG/YTpNQ==
   dependencies:
     "@ethersproject/bignumber" ">=5.0.0-beta.130"
 
@@ -93,9 +93,9 @@
   integrity sha512-1ISf7rFKFbMHlEB37JS7Oy3FgFlvzF2Ze2uFZMJHGKp9xgDvFy1VHNMBM1KrJPK4AqCZXww0//e2keLsN3g/Cw==
 
 "@ethersproject/properties@>=5.0.0-beta.131":
-  version "5.0.0-beta.135"
-  resolved "https://registry.yarnpkg.com/@ethersproject/properties/-/properties-5.0.0-beta.135.tgz#51a0a5d72ca034b5ae845d43ed409eb3576a3ca7"
-  integrity sha512-R4ROFaFh86n09eE+MWMPzaB87V5OSgqu0gtQ7LjUvkFF3eqdpdvLVD4N93hvCKNZcjGHI4WmazDUlpuXZVgDkA==
+  version "5.0.0-beta.136"
+  resolved "https://registry.yarnpkg.com/@ethersproject/properties/-/properties-5.0.0-beta.136.tgz#4834f6eeb4d66aa9d2bb4d8b7a8517077df3eb63"
+  integrity sha512-hK/fPtXjbcKeQyZV6rojDobToKNZ7bNYNY+jrUZRB9B5fStmU4veEwfP80xXB2WSNfZF6jRKdmmwmGj8QeHP0Q==
   dependencies:
     "@ethersproject/logger" ">=5.0.0-beta.129"
 
@@ -332,27 +332,21 @@
   resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-5.2.7.tgz#315d570ccb56c53452ff8638738df60726d5b6ea"
   integrity sha512-NYrtPht0wGzhwe9+/idPaBB+TqkY9AhTvOLMkThm0IoEfLaiVQZwBwyJ5puCkO3AUCWrmcoePjp2mbFocKy4SQ==
 
-"@types/node@*":
-  version "13.1.4"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.1.4.tgz#4cfd90175a200ee9b02bd6b1cd19bc349741607e"
-  integrity sha512-Lue/mlp2egZJoHXZr4LndxDAd7i/7SQYhV0EjWfb/a4/OZ6tuVwMCVPiwkU5nsEipxEf7hmkSU7Em5VQ8P5NGA==
-
-"@types/node@13.1.2":
-  version "13.1.2"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.1.2.tgz#fe94285bf5e0782e1a9e5a8c482b1c34465fa385"
-  integrity sha512-B8emQA1qeKerqd1dmIsQYnXi+mmAzTB7flExjmy5X1aVAKFNNNDubkavwR13kR6JnpeLp3aLoJhwn9trWPAyFQ==
+"@types/node@*", "@types/node@13.1.6":
+  version "13.1.6"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.1.6.tgz#076028d0b0400be8105b89a0a55550c86684ffec"
+  integrity sha512-Jg1F+bmxcpENHP23sVKkNuU3uaxPnsBMW0cLjleiikFKomJQbsn0Cqk2yDvQArqzZN6ABfBkZ0To7pQ8sLdWDg==
 
 "@types/node@^10.0.3", "@types/node@^10.12.18", "@types/node@^10.3.2":
-  version "10.17.9"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.17.9.tgz#4f251a1ed77ac7ef09d456247d67fc8173f6b9da"
-  integrity sha512-+6VygF9LbG7Gaqeog2G7u1+RUcmo0q1rI+2ZxdIg2fAUngk5Vz9fOCHXdloNUOHEPd1EuuOpL5O0CdgN9Fx5UQ==
+  version "10.17.13"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.17.13.tgz#ccebcdb990bd6139cd16e84c39dc2fb1023ca90c"
+  integrity sha512-pMCcqU2zT4TjqYFrWtYHKal7Sl30Ims6ulZ4UFXxI4xbtQqK/qqKwkDoBFCfooRqqmRu9vY3xaJRwxSh673aYg==
 
 "@types/node@^12.6.1":
   version "12.12.24"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-12.12.24.tgz#d4606afd8cf6c609036b854360367d1b2c78931f"
   integrity sha512-1Ciqv9pqwVtW6FsIUKSZNB82E5Cu1I2bBTj1xuIHXLe/1zYLl3956Nbhg2MzSYHVfl9/rmanjbQIb7LibfCnug==
 
-
 "@types/node@^8.0.0":
   version "8.10.59"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-8.10.59.tgz#9e34261f30183f9777017a13d185dfac6b899e04"
@@ -717,7 +711,7 @@ asynckit@^0.4.0:
   resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"
   integrity sha1-x57Zf380y48robyXkLzDZkdLS3k=
 
-atob@^2.1.1:
+atob@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.2.tgz#6d9517eb9e030d2436666651e86bd9f6f13533c9"
   integrity sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==
@@ -1672,7 +1666,7 @@ caseless@^0.12.0, caseless@~0.12.0:
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
   integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
 
-chai-bn@^0.2.0:
+chai-bn@0.2.0, chai-bn@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/chai-bn/-/chai-bn-0.2.0.tgz#7da60617531e5a8bdf9fbd5d848e693b7405a5cb"
   integrity sha512-h+XqIFikre13N3uiZSc50PZ0VztVjuD/Gytle07EUFkbd8z31tWp37DLAsR1dPozmOLA3yu4hi3IFjJDQ5CKBg==
@@ -2282,10 +2276,17 @@ deep-eql@^3.0.1:
   dependencies:
     type-detect "^4.0.0"
 
-deep-equal@~1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.0.1.tgz#f5d260292b660e084eff4cdbc9f08ad3247448b5"
-  integrity sha1-9dJgKStmDghO/0zbyfCK0yR0SLU=
+deep-equal@~1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.1.1.tgz#b5c98c942ceffaf7cb051e24e1434a25a2e6076a"
+  integrity sha512-yd9c5AdiqVcR+JjcwUQb9DkhJc8ngNr0MahEBGvDiJw8puWab2yZlh+nkasOnZP+EGTAP6rRp2JzJhJZzvNF8g==
+  dependencies:
+    is-arguments "^1.0.4"
+    is-date-object "^1.0.1"
+    is-regex "^1.0.4"
+    object-is "^1.0.1"
+    object-keys "^1.1.1"
+    regexp.prototype.flags "^1.2.0"
 
 deep-extend@^0.6.0:
   version "0.6.0"
@@ -2429,6 +2430,13 @@ dot-prop@^4.1.0:
   dependencies:
     is-obj "^1.0.0"
 
+dotignore@~0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/dotignore/-/dotignore-0.1.2.tgz#f942f2200d28c3a76fbdd6f0ee9f3257c8a2e905"
+  integrity sha512-UGGGWfSauusaVJC+8fgV+NVvBXkCTmVv7sk6nojDZZvuOUNGUy0Zk4UpHQD6EDjS0jpBwcACvH4eofvyzBcRDw==
+  dependencies:
+    minimatch "^3.0.4"
+
 drbg.js@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/drbg.js/-/drbg.js-1.0.1.tgz#3e36b6c42b37043823cdbc332d58f31e2445480b"
@@ -2467,9 +2475,9 @@ ee-first@1.1.1:
   integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=
 
 electron-to-chromium@^1.3.47:
-  version "1.3.326"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.326.tgz#71715aca9afd328ea208a3bc4651c15b869f0d1b"
-  integrity sha512-kaBmGWJlLW5bGEbm7/HWG9jt4oH+uecBIIfzFWfFkgqssPT2I6RDenGqo4wmKzm7seNu7DSCRZBXCuf7w8dtkQ==
+  version "1.3.328"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.328.tgz#a619575c42f1d5b443103664f25ffa5a80190ee5"
+  integrity sha512-x4XefnFxDxFwaQ01d/pppJP9meWhOIJ/gtI6/4jqkpsadq79uL7NYSaX64naLmJqvzUBjSrO3IM2+1b/W9KdPg==
 
 elliptic@6.3.3:
   version "6.3.3"
@@ -2481,7 +2489,7 @@ elliptic@6.3.3:
     hash.js "^1.0.0"
     inherits "^2.0.1"
 
-elliptic@6.5.2, elliptic@^6.0.0, elliptic@^6.4.0, elliptic@^6.4.1:
+elliptic@6.5.2, elliptic@^6.0.0, elliptic@^6.4.0, elliptic@^6.5.2:
   version "6.5.2"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.2.tgz#05c5678d7173c049d8ca433552224a495d0e3762"
   integrity sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==
@@ -2547,21 +2555,22 @@ error-ex@^1.3.1:
   dependencies:
     is-arrayish "^0.2.1"
 
-es-abstract@^1.5.0:
-  version "1.16.3"
-  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.16.3.tgz#52490d978f96ff9f89ec15b5cf244304a5bca161"
-  integrity sha512-WtY7Fx5LiOnSYgF5eg/1T+GONaGmpvpPdCpSnYij+U2gDTL0UPfWrhDw7b2IYb+9NQJsYpCA0wOQvZfsd6YwRw==
+es-abstract@^1.17.0-next.1:
+  version "1.17.0"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.17.0.tgz#f42a517d0036a5591dbb2c463591dc8bb50309b1"
+  integrity sha512-yYkE07YF+6SIBmg1MsJ9dlub5L48Ek7X0qz+c/CPCHS9EBXfESorzng4cJQjJW5/pB6vDF41u7F8vUhLVDqIug==
   dependencies:
     es-to-primitive "^1.2.1"
     function-bind "^1.1.1"
     has "^1.0.3"
     has-symbols "^1.0.1"
-    is-callable "^1.1.4"
-    is-regex "^1.0.4"
+    is-callable "^1.1.5"
+    is-regex "^1.0.5"
     object-inspect "^1.7.0"
     object-keys "^1.1.1"
-    string.prototype.trimleft "^2.1.0"
-    string.prototype.trimright "^2.1.0"
+    object.assign "^4.1.0"
+    string.prototype.trimleft "^2.1.1"
+    string.prototype.trimright "^2.1.1"
 
 es-to-primitive@^1.2.1:
   version "1.2.1"
@@ -2843,17 +2852,17 @@ ethereumjs-block@^1.2.2, ethereumjs-block@^1.4.1, ethereumjs-block@^1.6.0:
     merkle-patricia-tree "^2.1.2"
 
 ethereumjs-block@~2.2.0:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/ethereumjs-block/-/ethereumjs-block-2.2.1.tgz#5fba423305b40ab6486a6b81922e5312b2667c8d"
-  integrity sha512-ze8I1844m5oKZL7hiHuezRcPzqdi4Iv0ssqQyuRaJ9Je0/YCYfXobJHvNLnex2ETgs5JypicdtLYrCNWdgcLvg==
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/ethereumjs-block/-/ethereumjs-block-2.2.2.tgz#c7654be7e22df489fda206139ecd63e2e9c04965"
+  integrity sha512-2p49ifhek3h2zeg/+da6XpdFR3GlqY3BIEiqxGF8j9aSRIgkb7M1Ky+yULBKJOu8PAZxfhsYA+HxUk2aCQp3vg==
   dependencies:
     async "^2.0.1"
-    ethereumjs-common "^1.1.0"
+    ethereumjs-common "^1.5.0"
     ethereumjs-tx "^2.1.1"
     ethereumjs-util "^5.0.0"
     merkle-patricia-tree "^2.1.2"
 
-ethereumjs-common@^1.1.0, ethereumjs-common@^1.3.1, ethereumjs-common@^1.3.2:
+ethereumjs-common@^1.1.0, ethereumjs-common@^1.3.2, ethereumjs-common@^1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/ethereumjs-common/-/ethereumjs-common-1.5.0.tgz#d3e82fc7c47c0cef95047f431a99485abc9bb1cd"
   integrity sha512-SZOjgK1356hIY7MRj3/ma5qtfr/4B5BL+G4rP/XSMYr2z1H5el4RX5GReYCKmQmYI/nSBmRnwrZ17IfHuG0viQ==
@@ -2867,11 +2876,11 @@ ethereumjs-tx@^1.0.0, ethereumjs-tx@^1.1.1, ethereumjs-tx@^1.2.0, ethereumjs-tx@
     ethereumjs-util "^5.0.0"
 
 ethereumjs-tx@^2.1.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/ethereumjs-tx/-/ethereumjs-tx-2.1.1.tgz#7d204e2b319156c9bc6cec67e9529424a26e8ccc"
-  integrity sha512-QtVriNqowCFA19X9BCRPMgdVNJ0/gMBS91TQb1DfrhsbR748g4STwxZptFAwfqehMyrF8rDwB23w87PQwru0wA==
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/ethereumjs-tx/-/ethereumjs-tx-2.1.2.tgz#5dfe7688bf177b45c9a23f86cf9104d47ea35fed"
+  integrity sha512-zZEK1onCeiORb0wyCXUvg94Ve5It/K6GD1K+26KfFKodiBiS6d9lfCXlUKGBBdQ+bv7Day+JK0tj1K+BeNFRAw==
   dependencies:
-    ethereumjs-common "^1.3.1"
+    ethereumjs-common "^1.5.0"
     ethereumjs-util "^6.0.0"
 
 ethereumjs-util@6.1.0:
@@ -2965,7 +2974,6 @@ ethers@^4.0.0-beta.1, ethers@^4.0.32, ethers@^4.0.40:
   version "4.0.42"
   resolved "https://registry.yarnpkg.com/ethers/-/ethers-4.0.42.tgz#7def83a1f770b84d44cf1c2dfc58b7fd29d1d45d"
   integrity sha512-2gmmt5x683Xz4QwGDBVJhrdXevVAEr5fnXPGDPou2AKB+zklrirGpl0w1SHBn7Wa9hbL2z6MvP3n7k8Yss2MFg==
-
   dependencies:
     aes-js "3.0.0"
     bn.js "^4.4.0"
@@ -3510,7 +3518,7 @@ fsevents@^1.0.0:
     bindings "^1.5.0"
     nan "^2.12.1"
 
-function-bind@^1.0.2, function-bind@^1.1.1, function-bind@~1.1.1:
+function-bind@^1.1.1, function-bind@~1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
   integrity sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==
@@ -3673,7 +3681,7 @@ glob@^5.0.15:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@~7.1.4:
+glob@^7.0.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@~7.1.6:
   version "7.1.6"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.6.tgz#141f33b81a7c2492e125594307480c46679278a6"
   integrity sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==
@@ -3722,9 +3730,9 @@ globals@^9.18.0:
   integrity sha512-S0nG3CLEQiY/ILxqtztTWH/3iRRdyBLw6KMDxnKMchrtbj2OFmehVh0WUCfW3DUrIgx/qFrJPICrq4Z4sTR9UQ==
 
 globby@^10.0.1:
-  version "10.0.1"
-  resolved "https://registry.yarnpkg.com/globby/-/globby-10.0.1.tgz#4782c34cb75dd683351335c5829cc3420e606b22"
-  integrity sha512-sSs4inE1FB2YQiymcmTv6NWENryABjUNPeWhOvmn4SjtKybglsyPZxFB3U1/+L1bYi0rNZDqCLlHyLYDl1Pq5A==
+  version "10.0.2"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-10.0.2.tgz#277593e745acaa4646c3ab411289ec47a0392543"
+  integrity sha512-7dUi7RvCoT/xast/o/dLN53oqND4yk0nsHkhRgn9w65C4PofCLOoJ39iSOg+qVDdWQPIEj+eszMHQ+aLVwwQSg==
   dependencies:
     "@types/glob" "^7.1.1"
     array-union "^2.1.0"
@@ -3848,7 +3856,7 @@ has-symbol-support-x@^1.4.1:
   resolved "https://registry.yarnpkg.com/has-symbol-support-x/-/has-symbol-support-x-1.4.2.tgz#1409f98bc00247da45da67cee0a36f282ff26455"
   integrity sha512-3ToOva++HaW+eCpgqZrCfN51IPB+7bJNVT6CUATzueB5Heb8o6Nam0V3HG5dlDvZU1Gn5QLcbahiKw/XVk5JJw==
 
-has-symbols@^1.0.1:
+has-symbols@^1.0.0, has-symbols@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.1.tgz#9f5214758a44196c406d9bd76cebf81ec2dd31e8"
   integrity sha512-PLcsoqu++dmEIZB+6totNFKq/7Do+Z0u4oT0zKOJNl3lYK6vGwwu2hjHs+68OEZbTjiUE9bgOABXbP/GvrS0Kg==
@@ -4191,6 +4199,11 @@ is-accessor-descriptor@^1.0.0:
   dependencies:
     kind-of "^6.0.0"
 
+is-arguments@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/is-arguments/-/is-arguments-1.0.4.tgz#3faf966c7cba0ff437fb31f6250082fcf0448cf3"
+  integrity sha512-xPh0Rmt8NE65sNzvyUmWgI1tz3mKq74lGA0mL8LYZcoIzKOzDh6HmrYm3d18k60nHerC8A9Km8kYu87zfSFnLA==
+
 is-arrayish@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
@@ -4208,10 +4221,10 @@ is-buffer@^1.1.5:
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
   integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==
 
-is-callable@^1.1.3, is-callable@^1.1.4:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.4.tgz#1e1adf219e1eeb684d691f9d6a05ff0d30a24d75"
-  integrity sha512-r5p9sxJjYnArLjObpjA4xu5EKI3CuKHkJXMhT7kwbpUyIFD1n5PMAsoPvWnvtZiNz7LjkYDRZhd7FlI0eMijEA==
+is-callable@^1.1.3, is-callable@^1.1.4, is-callable@^1.1.5:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.5.tgz#f7e46b596890456db74e7f6e976cb3273d06faab"
+  integrity sha512-ESKv5sMCJB2jnHTWZ3O5itG+O128Hsus4K4Qh1h2/cgn2vbgnLSVqfV46AeJA9D5EeeLa9w81KUXMtn34zhX+Q==
 
 is-ci@^2.0.0:
   version "2.0.0"
@@ -4235,9 +4248,9 @@ is-data-descriptor@^1.0.0:
     kind-of "^6.0.0"
 
 is-date-object@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz#9aa20eb6aeebbff77fbd33e74ca01b33581d3a16"
-  integrity sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY=
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.2.tgz#bda736f2cd8fd06d32844e7743bfa7494c3bfd7e"
+  integrity sha512-USlDT524woQ08aoZFzh3/Z6ch9Y/EWXEHQ/AaRN0SkKq4t2Jw2R2339tSXmwuVoY7LLlBCbOIlx2myP/L5zk0g==
 
 is-descriptor@^0.1.0:
   version "0.1.6"
@@ -4420,7 +4433,7 @@ is-primitive@^2.0.0:
   resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
   integrity sha1-IHurkWOEmcB7Kt8kCkGochADRXU=
 
-is-regex@^1.0.4:
+is-regex@^1.0.4, is-regex@^1.0.5, is-regex@~1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.0.5.tgz#39d589a358bf18967f726967120b8fc1aed74eae"
   integrity sha512-vlKW17SNq44owv5AQR3Cq0bQPEb8+kF3UKZ2fiZNOWtztYE5i0CzCZxFDwO58qAOWtxdBRVO/V5Qin1wjCqFYQ==
@@ -4491,26 +4504,6 @@ isstream@~0.1.2:
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
   integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
 
-istanbul@^0.4.5:
-  version "0.4.5"
-  resolved "https://registry.yarnpkg.com/istanbul/-/istanbul-0.4.5.tgz#65c7d73d4c4da84d4f3ac310b918fb0b8033733b"
-  integrity sha1-ZcfXPUxNqE1POsMQuRj7C4Azczs=
-  dependencies:
-    abbrev "1.0.x"
-    async "1.x"
-    escodegen "1.8.x"
-    esprima "2.7.x"
-    glob "^5.0.15"
-    handlebars "^4.0.1"
-    js-yaml "3.x"
-    mkdirp "0.5.x"
-    nopt "3.x"
-    once "1.x"
-    resolve "1.1.x"
-    supports-color "^3.1.0"
-    which "^1.1.1"
-    wordwrap "^1.0.0"
-
 isurl@^1.0.0-alpha5:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isurl/-/isurl-1.0.0.tgz#b27f4f49f3cdaa3ea44a0a5b7f3462e6edc39d67"
@@ -5659,17 +5652,17 @@ object-copy@^0.1.0:
     define-property "^0.2.5"
     kind-of "^3.0.3"
 
-object-inspect@^1.7.0:
+object-inspect@^1.7.0, object-inspect@~1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.7.0.tgz#f4f6bd181ad77f006b5ece60bd0b6f398ff74a67"
   integrity sha512-a7pEHdh1xKIAgTySUGgLMx/xwDZskN1Ud6egYYN3EdRW4ZMPNEDUTF+hwy2LUC+Bl+SyLXANnwz/jyh/qutKUw==
 
-object-inspect@~1.6.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.6.0.tgz#c70b6cbf72f274aab4c34c0c82f5167bf82cf15b"
-  integrity sha512-GJzfBZ6DgDAmnuaM3104jR4s1Myxr3Y3zfIyN4z3UdqN69oSRacNK8UhnobDdC+7J2AHCjGwxQubNJfE70SXXQ==
+object-is@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/object-is/-/object-is-1.0.2.tgz#6b80eb84fe451498f65007982f035a5b445edec4"
+  integrity sha512-Epah+btZd5wrrfjkJZq1AOB9O6OxUQto45hzFd7lXGrpHPGE0W1k+426yrZV+k6NJOzLNNW/nVsmZdIWsAqoOQ==
 
-object-keys@^1.0.12, object-keys@^1.1.1:
+object-keys@^1.0.11, object-keys@^1.0.12, object-keys@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.1.1.tgz#1c47f272df277f3b1daf061677d9c82e2322c60e"
   integrity sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==
@@ -5686,6 +5679,16 @@ object-visit@^1.0.0:
   dependencies:
     isobject "^3.0.0"
 
+object.assign@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/object.assign/-/object.assign-4.1.0.tgz#968bf1100d7956bb3ca086f006f846b3bc4008da"
+  integrity sha512-exHJeq6kBKj58mqGyTQ9DFvrZC/eR6OwxzoM9YRoGBqrXYonaFyGiFMuc9VZrXf7DarreEwMpurG3dd+CNyW5w==
+  dependencies:
+    define-properties "^1.1.2"
+    function-bind "^1.1.1"
+    has-symbols "^1.0.0"
+    object-keys "^1.0.11"
+
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -5816,9 +5819,9 @@ p-limit@^1.1.0:
     p-try "^1.0.0"
 
 p-limit@^2.0.0, p-limit@^2.2.0:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-2.2.1.tgz#aa07a788cc3151c939b5131f63570f0dd2009537"
-  integrity sha512-85Tk+90UCVWvbDavCLKPOLC9vvY8OwEX/RtKF+/1OADJMVlFfEHOiMTPVyxg7mk/dKa+ipdHm0OUkTvCpMTuwg==
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-2.2.2.tgz#61279b67721f5287aa1c13a9a7fbbc48c9291b1e"
+  integrity sha512-WGR+xHecKTr7EbUEhyLSh5Dube9JtdiG78ufaeLxTgpudf/20KqyMioIUZJAezlTIi6evxuoUs9YXc11cU+yzQ==
   dependencies:
     p-try "^2.0.0"
 
@@ -5871,9 +5874,9 @@ package-json@^6.3.0:
     semver "^6.2.0"
 
 pacote@^9.5.8:
-  version "9.5.11"
-  resolved "https://registry.yarnpkg.com/pacote/-/pacote-9.5.11.tgz#524152077cb392c47b1fbe198aa28f778bef7ee1"
-  integrity sha512-DMDPvFKCjCg6zMS4IfzZyvT57O/bX8XGG00eEoy4K/S4Wj+qiN8KbnmKpsTvfS6OL9r5TAicxMKWbj1yV2Yh4g==
+  version "9.5.12"
+  resolved "https://registry.yarnpkg.com/pacote/-/pacote-9.5.12.tgz#1e11dd7a8d736bcc36b375a9804d41bb0377bf66"
+  integrity sha512-BUIj/4kKbwWg4RtnBncXPJd15piFSVNpTzY0rysSr3VnMowTYgkGKcaHrbReepAkjTr8lH2CVWRi58Spg2CicQ==
   dependencies:
     bluebird "^3.5.3"
     cacache "^12.0.2"
@@ -6226,9 +6229,9 @@ pseudomap@^1.0.2:
   integrity sha1-8FKijacOYYkX7wqKw0wa5aaChrM=
 
 psl@^1.1.24, psl@^1.1.28:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/psl/-/psl-1.6.0.tgz#60557582ee23b6c43719d9890fb4170ecd91e110"
-  integrity sha512-SYKKmVel98NCOYXpkwUqZqh0ahZeeKfmisiLIcEZdsb+WbLv02g/dI5BUmZnIyOe7RzZtLax81nnb2HbvC2tzA==
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/psl/-/psl-1.7.0.tgz#f1c4c47a8ef97167dea5d6bbf4816d736e884a3c"
+  integrity sha512-5NsSEDv8zY70ScRnOTn7bK7eanl2MvFrOrS/R6x+dBt5g1ghnj9Zv90kO8GwT8gxcu2ANyFprnFYB85IogIJOQ==
 
 public-encrypt@^4.0.0:
   version "4.0.3"
@@ -6433,7 +6436,7 @@ read-pkg@^5.2.0:
     parse-json "^5.0.0"
     type-fest "^0.6.0"
 
-"readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.2, readable-stream@^2.0.6, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.9, readable-stream@^2.3.0, readable-stream@^2.3.5, readable-stream@^2.3.6, readable-stream@~2.3.6:
+"readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.2, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.9, readable-stream@^2.3.0, readable-stream@^2.3.5, readable-stream@^2.3.6, readable-stream@~2.3.6:
   version "2.3.7"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.7.tgz#1eca1cf711aef814c04f62252a36a62f6cb23b57"
   integrity sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==
@@ -6539,6 +6542,14 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
+regexp.prototype.flags@^1.2.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/regexp.prototype.flags/-/regexp.prototype.flags-1.3.0.tgz#7aba89b3c13a64509dabcf3ca8d9fbb9bdf5cb75"
+  integrity sha512-2+Q0C5g951OlYlJz6yu5/M33IcsESLlLfsyIaLJaG4FA2r4yP8MvVMJUUP/fVBkSpbbbZlS5gynbEWLipiiXiQ==
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0-next.1"
+
 regexpu-core@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/regexpu-core/-/regexpu-core-2.0.0.tgz#49d038837b8dcf8bfa5b9a42139938e6ea2ae240"
@@ -6697,17 +6708,10 @@ resolve@1.1.x:
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
   integrity sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=
 
-resolve@^1.1.6, resolve@^1.10.0, resolve@^1.3.2, resolve@^1.8.1:
-  version "1.13.1"
-  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.13.1.tgz#be0aa4c06acd53083505abb35f4d66932ab35d16"
-  integrity sha512-CxqObCX8K8YtAhOBRg+lrcdn+LK+WYOS8tSjqSFbjtrI5PnS63QPhZl4+yKfrU9tdsbMu9Anr/amegT87M9Z6w==
-  dependencies:
-    path-parse "^1.0.6"
-
-resolve@~1.11.1:
-  version "1.11.1"
-  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.11.1.tgz#ea10d8110376982fef578df8fc30b9ac30a07a3e"
-  integrity sha512-vIpgF6wfuJOZI7KKKSP+HmiKggadPQAdsp5HiC1mvqnfp0gF1vdwgBWZIdrVft9pgqoMFQN+R7BSWZiBxx+BBw==
+resolve@^1.1.6, resolve@^1.10.0, resolve@^1.3.2, resolve@^1.8.1, resolve@~1.14.2:
+  version "1.14.2"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.14.2.tgz#dbf31d0fa98b1f29aa5169783b9c290cb865fea2"
+  integrity sha512-EjlOBLBO1kxsUxsKjLt7TAECyKW6fOh1VRkykQkKGzcBbjjPIxBqGh0jf7GJ3k/f5mxMqW3htMD3WdTUVtW8HQ==
   dependencies:
     path-parse "^1.0.6"
 
@@ -6815,6 +6819,26 @@ safe-regex@^1.1.0:
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
 
+sc-istanbul@^0.4.5:
+  version "0.4.5"
+  resolved "https://registry.yarnpkg.com/sc-istanbul/-/sc-istanbul-0.4.5.tgz#1896066484d55336cf2cdbcc7884dc79da50dc76"
+  integrity sha512-7wR5EZFLsC4w0wSm9BUuCgW+OGKAU7PNlW5L0qwVPbh+Q1sfVn2fyzfMXYCm6rkNA5ipaCOt94nApcguQwF5Gg==
+  dependencies:
+    abbrev "1.0.x"
+    async "1.x"
+    escodegen "1.8.x"
+    esprima "2.7.x"
+    glob "^5.0.15"
+    handlebars "^4.0.1"
+    js-yaml "3.x"
+    mkdirp "0.5.x"
+    nopt "3.x"
+    once "1.x"
+    resolve "1.1.x"
+    supports-color "^3.1.0"
+    which "^1.1.1"
+    wordwrap "^1.0.0"
+
 scrypt-js@2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/scrypt-js/-/scrypt-js-2.0.3.tgz#bb0040be03043da9a012a2cea9fc9f852cfc87d4"
@@ -6861,16 +6885,16 @@ scryptsy@^1.2.1:
     pbkdf2 "^3.0.3"
 
 secp256k1@^3.0.1:
-  version "3.7.1"
-  resolved "https://registry.yarnpkg.com/secp256k1/-/secp256k1-3.7.1.tgz#12e473e0e9a7c2f2d4d4818e722ad0e14cc1e2f1"
-  integrity sha512-1cf8sbnRreXrQFdH6qsg2H71Xw91fCCS9Yp021GnUNJzWJS/py96fS4lHbnTnouLp08Xj6jBoBB6V78Tdbdu5g==
+  version "3.8.0"
+  resolved "https://registry.yarnpkg.com/secp256k1/-/secp256k1-3.8.0.tgz#28f59f4b01dbee9575f56a47034b7d2e3b3b352d"
+  integrity sha512-k5ke5avRZbtl9Tqx/SA7CbY3NF6Ro+Sj9cZxezFzuBlLDmyqPiL8hJJ+EmzD8Ig4LUDByHJ3/iPOVoRixs/hmw==
   dependencies:
     bindings "^1.5.0"
     bip66 "^1.1.5"
     bn.js "^4.11.8"
     create-hash "^1.2.0"
     drbg.js "^1.0.1"
-    elliptic "^6.4.1"
+    elliptic "^6.5.2"
     nan "^2.14.0"
     safe-buffer "^5.1.2"
 
@@ -7144,10 +7168,10 @@ soldoc@0.1.2-beta.6:
   dependencies:
     solidity-parser-antlr "git://github.com/obernardovieira/solidity-parser-antlr.git#80086a4"
 
-solidity-coverage@0.7.0:
-  version "0.7.0"
-  resolved "https://registry.yarnpkg.com/solidity-coverage/-/solidity-coverage-0.7.0.tgz#639c9c5b7566c2270798a4cdbf3d61dbebb89677"
-  integrity sha512-zZSIYUkQ3sydc9QOfnWODvXz2NSVZlJDqNpJXONdN+YssN0BA2q7FXObaVi56LqyBjyKJaEXfrZrr39oUhHZoQ==
+solidity-coverage@0.7.1:
+  version "0.7.1"
+  resolved "https://registry.yarnpkg.com/solidity-coverage/-/solidity-coverage-0.7.1.tgz#65e69483dbd67b8a292d820b14b69ee9a2858fb4"
+  integrity sha512-8IxnxE6DRiF0UomFxjVWqmv8fgY1W5m1wCvshHE1JfR+yVDNyYTJnpfPsBzHGQRJ3+OlwLZv6BzamrAV9H9bmg==
   dependencies:
     "@truffle/provider" "^0.1.17"
     chalk "^2.4.2"
@@ -7158,12 +7182,12 @@ solidity-coverage@0.7.0:
     ghost-testrpc "^0.0.2"
     global-modules "^2.0.0"
     globby "^10.0.1"
-    istanbul "^0.4.5"
     jsonschema "^1.2.4"
     lodash "^4.17.15"
     node-emoji "^1.10.0"
     pify "^4.0.1"
     recursive-readdir "^2.2.2"
+    sc-istanbul "^0.4.5"
     shelljs "^0.8.3"
     solidity-parser-antlr "0.4.7"
     web3 "1.2.1"
@@ -7195,11 +7219,11 @@ solparse@2.2.8:
     yargs "^10.0.3"
 
 source-map-resolve@^0.5.0:
-  version "0.5.2"
-  resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.2.tgz#72e2cc34095543e43b2c62b2c4c10d4a9054f259"
-  integrity sha512-MjqsvNwyz1s0k81Goz/9vRBe9SZdB09Bdw+/zYyO+3CuPk6fouTaxscHkgtE8jKvf01kVfl8riHzERQ/kefaSA==
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.3.tgz#190866bece7553e1f8f267a2ee82c606b5509a1a"
+  integrity sha512-Htz+RnsXWk5+P2slx5Jh3Q66vhQj1Cllm0zvnaY98+NFx+Dv2CF/f5O/t8x+KaNdrdIAsruNzoh/KpialbqAnw==
   dependencies:
-    atob "^2.1.1"
+    atob "^2.1.2"
     decode-uri-component "^0.2.0"
     resolve-url "^0.2.1"
     source-map-url "^0.4.0"
@@ -7377,27 +7401,27 @@ string-width@^3.0.0, string-width@^3.1.0:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^5.1.0"
 
-string.prototype.trim@~1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/string.prototype.trim/-/string.prototype.trim-1.1.2.tgz#d04de2c89e137f4d7d206f086b5ed2fae6be8cea"
-  integrity sha1-0E3iyJ4Tf019IG8Ia17S+ua+jOo=
+string.prototype.trim@~1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/string.prototype.trim/-/string.prototype.trim-1.2.1.tgz#141233dff32c82bfad80684d7e5f0869ee0fb782"
+  integrity sha512-MjGFEeqixw47dAMFMtgUro/I0+wNqZB5GKXGt1fFr24u3TzDXCPu7J9Buppzoe3r/LqkSDLDDJzE15RGWDGAVw==
   dependencies:
-    define-properties "^1.1.2"
-    es-abstract "^1.5.0"
-    function-bind "^1.0.2"
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0-next.1"
+    function-bind "^1.1.1"
 
-string.prototype.trimleft@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/string.prototype.trimleft/-/string.prototype.trimleft-2.1.0.tgz#6cc47f0d7eb8d62b0f3701611715a3954591d634"
-  integrity sha512-FJ6b7EgdKxxbDxc79cOlok6Afd++TTs5szo+zJTUyow3ycrRfJVE2pq3vcN53XexvKZu/DJMDfeI/qMiZTrjTw==
+string.prototype.trimleft@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimleft/-/string.prototype.trimleft-2.1.1.tgz#9bdb8ac6abd6d602b17a4ed321870d2f8dcefc74"
+  integrity sha512-iu2AGd3PuP5Rp7x2kEZCrB2Nf41ehzh+goo8TV7z8/XDBbsvc6HQIlUl9RjkZ4oyrW1XM5UwlGl1oVEaDjg6Ag==
   dependencies:
     define-properties "^1.1.3"
     function-bind "^1.1.1"
 
-string.prototype.trimright@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/string.prototype.trimright/-/string.prototype.trimright-2.1.0.tgz#669d164be9df9b6f7559fa8e89945b168a5a6c58"
-  integrity sha512-fXZTSV55dNBwv16uw+hh5jkghxSnc5oHq+5K/gXgizHwAvMetdAJlHqqoFC1FSDVPYWLkAKl2cxpUT41sV7nSg==
+string.prototype.trimright@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimright/-/string.prototype.trimright-2.1.1.tgz#440314b15996c866ce8a0341894d45186200c5d9"
+  integrity sha512-qFvWL3/+QIgZXVmJBfpHmxLB7xsUXz6HsUmP8+5dRaC3Q7oKUv9Vo6aMCRZC1smrtyECFsIT30PqBJ1gTjAs+g==
   dependencies:
     define-properties "^1.1.3"
     function-bind "^1.1.1"
@@ -7544,22 +7568,24 @@ sync-rpc@^1.2.1:
     get-port "^3.1.0"
 
 tape@^4.6.3:
-  version "4.11.0"
-  resolved "https://registry.yarnpkg.com/tape/-/tape-4.11.0.tgz#63d41accd95e45a23a874473051c57fdbc58edc1"
-  integrity sha512-yixvDMX7q7JIs/omJSzSZrqulOV51EC9dK8dM0TzImTIkHWfe2/kFyL5v+d9C+SrCMaICk59ujsqFAVidDqDaA==
+  version "4.13.0"
+  resolved "https://registry.yarnpkg.com/tape/-/tape-4.13.0.tgz#e2f581ff5f12a7cbd787e9f83c76c2851782fce2"
+  integrity sha512-J/hvA+GJnuWJ0Sj8Z0dmu3JgMNU+MmusvkCT7+SN4/2TklW18FNCp/UuHIEhPZwHfy4sXfKYgC7kypKg4umbOw==
   dependencies:
-    deep-equal "~1.0.1"
+    deep-equal "~1.1.1"
     defined "~1.0.0"
+    dotignore "~0.1.2"
     for-each "~0.3.3"
     function-bind "~1.1.1"
-    glob "~7.1.4"
+    glob "~7.1.6"
     has "~1.0.3"
     inherits "~2.0.4"
+    is-regex "~1.0.5"
     minimist "~1.2.0"
-    object-inspect "~1.6.0"
-    resolve "~1.11.1"
+    object-inspect "~1.7.0"
+    resolve "~1.14.2"
     resumer "~0.0.0"
-    string.prototype.trim "~1.1.2"
+    string.prototype.trim "~1.2.1"
     through "~2.3.8"
 
 tar-stream@^1.5.2:
@@ -7769,16 +7795,16 @@ ts-generator@0.0.8, ts-generator@^0.0.8:
     resolve "^1.8.1"
     ts-essentials "^1.0.0"
 
-ts-node@8.5.4:
-  version "8.5.4"
-  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-8.5.4.tgz#a152add11fa19c221d0b48962c210cf467262ab2"
-  integrity sha512-izbVCRV68EasEPQ8MSIGBNK9dc/4sYJJKYA+IarMQct1RtEot6Xp0bXuClsbUSnKpg50ho+aOAx8en5c+y4OFw==
+ts-node@8.6.0:
+  version "8.6.0"
+  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-8.6.0.tgz#347a5d2225b7bc2f617d40853e38f6507c39ce0a"
+  integrity sha512-NVJ/5ZjrxCS445zMIxGWiieTZoWcHbqtVKa+1V7opSmOFCYi7fvkugEXZBC9IvUnEzNewZWy8dw0u6iSTridpA==
   dependencies:
     arg "^4.1.0"
     diff "^4.0.1"
     make-error "^1.1.1"
     source-map-support "^0.5.6"
-    yn "^3.0.0"
+    yn "^4.0.0"
 
 tslib@^1.8.0, tslib@^1.8.1:
   version "1.10.0"
@@ -7915,9 +7941,9 @@ uc.micro@^1.0.1, uc.micro@^1.0.5:
   integrity sha512-8Y75pvTYkLJW2hWQHXxoqRgV7qb9B+9vFEtidML+7koHUFapnVJAZ6cKs+Qjz5Aw3aZWHMC6u0wJE3At+nSGwA==
 
 uglify-js@^3.1.4:
-  version "3.7.2"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.2.tgz#cb1a601e67536e9ed094a92dd1e333459643d3f9"
-  integrity sha512-uhRwZcANNWVLrxLfNFEdltoPNhECUR3lc+UdJoG9CBpMcSnKyWA94tc3eAujB1GcMY5Uwq8ZMp4qWpxWYDQmaA==
+  version "3.7.4"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.4.tgz#e6d83a1aa32ff448bd1679359ab13d8db0fe0743"
+  integrity sha512-tinYWE8X1QfCHxS1lBS8yiDekyhSXOO6R66yNOCdUJeojxxw+PX2BHAz/BWyW7PQ7pkiWVxJfIEbiDxyLWvUGg==
   dependencies:
     commander "~2.20.3"
     source-map "~0.6.1"
@@ -7935,11 +7961,16 @@ unbzip2-stream@^1.0.9:
     buffer "^5.2.1"
     through "^2.3.8"
 
-underscore@1.9.1, underscore@^1.8.3:
+underscore@1.9.1:
   version "1.9.1"
   resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.9.1.tgz#06dce34a0e68a7babc29b365b8e74b8925203961"
   integrity sha512-5/4etnCkd9c8gwgowi5/om/mYO5ajCaOgdzj/oW+0eQV9WxKBDZw5+ycmKmeaTXjInS/W0BzpGLo2xR2aBwZdg==
 
+underscore@^1.8.3:
+  version "1.9.2"
+  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.9.2.tgz#0c8d6f536d6f378a5af264a72f7bec50feb7cf2f"
+  integrity sha512-D39qtimx0c1fI3ya1Lnhk3E9nONswSKhnffBI0gME9C99fYOkNi04xs8K6pePLhvl1frbDemkaBQ5ikWllR2HQ==
+
 union-value@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/union-value/-/union-value-1.0.1.tgz#0b6fe7b835aecda61c6ea4d4f02c14221e109847"
@@ -8631,6 +8662,7 @@ web3-net@1.2.4:
 
 "web3-provider-engine@https://github.com/trufflesuite/provider-engine#web3-one":
   version "14.0.6"
+  uid "3538c60bc4836b73ccae1ac3f64c8fed8ef19c1a"
   resolved "https://github.com/trufflesuite/provider-engine#3538c60bc4836b73ccae1ac3f64c8fed8ef19c1a"
   dependencies:
     async "^2.5.0"
@@ -9118,7 +9150,7 @@ yauzl@^2.4.2:
     buffer-crc32 "~0.2.3"
     fd-slicer "~1.1.0"
 
-yn@^3.0.0:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"
-  integrity sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==
+yn@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/yn/-/yn-4.0.0.tgz#611480051ea43b510da1dfdbe177ed159f00a979"
+  integrity sha512-huWiiCS4TxKc4SfgmTwW1K7JmXPPAmuXWYy4j9qjQo4+27Kni8mGhAAi1cloRWmBe2EqcLgt3IGqQoRL/MtPgg==