Provide a toJson method on receipt and record which is consistent across all SDKs

[gregscullard]

Problem

Using different SDKs with WalletConnect, it's impossible to provide a consistent JSON representation of a Receipt or Record.
.stringify and .marshal in javascript and golang output differing results.

Solution

Add a toJson method to receipt and record which convert the object to a consistent JSON format (using the JS stringify as a reference) so that all SDKs can generate identical Json.

Alternatives

Let developers write their own equivalence libraries which is likely to go wrong with changes to receipts/records.

[thenswan]

Hi @gregscullard and thank you for submitting this issue. I will check it.

[gregscullard]

Also for TransactionResponse