Add action to publish to npm

.github/workflows/publish.yaml

@@ -0,0 +1,31 @@
+name: npm publish
+on:
+  release:
+    types: [published]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - id: get-nvmrc
+        run: echo VERSION=$(cat .nvmrc) >> $GITHUB_OUTPUT
+      - id: get-tag
+        run: |
+          if [[ $GITHUB_REF =~ [0-9]+.[0-9]+.[0-9]+$ ]]; then
+              echo TAG=latest >> $GITHUB_OUTPUT
+          else
+              echo TAG=beta >> $GITHUB_OUTPUT
+          fi
+      - uses: actions/setup-node@v3
+        with:
+          registry-url: https://registry.npmjs.org
+          node-version: ${{ steps.get-nvmrc.outputs.VERSION }}
+      - run: npm ci
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_REGISTRY_KEY }}
+      - run: npm run test
+      - run: npm run build
+      - run: npm version ${{ github.event.release.tag_name }} --no-git-tag-version
+      - run: npm publish --tag ${{ steps.get-tag.outputs.TAG }}
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_REGISTRY_KEY }}