🔧 add github action to publish to NPM on each new release

.github/workflows/npmpublish.yml

@@ -0,0 +1,19 @@
+name: Publish Node.js Package
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish-npm:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 16
+          registry-url: 'https://registry.npmjs.org'
+      - run: npm install
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}