Add GitHub workflow to publish releases to npm

Signed-off-by: Andrew Richardson <[email protected]>

Author: awrichar

.github/workflows/release.yml

@@ -0,0 +1,24 @@
+name: npm Release
+
+on:
+  release:
+    types: [released, prereleased]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+        uses: actions/checkout@v2
+
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '16.x'
+
+      - run: npm ci
+
+      - name: Release to NPM
+        run: npm publish
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}