build: add npm publication logic

Author: bcoe

.github/workflows/release.yml

@@ -13,3 +13,19 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           release-type: node
           bump-minor-pre-major: true
+      # The logic below handles the npm publication:
+      - uses: actions/checkout@v2
+        # these if statements ensure that a publication only occurs when
+        # a new release is created:
+        if: ${{ steps.release.outputs.release_created }}
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 16
+          registry-url: 'https://external-dot-oss-automation.appspot.com'
+        if: ${{ steps.release.outputs.release_created }}
+      - run: npm ci
+        if: ${{ steps.release.outputs.release_created }}
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}
+        if: ${{ steps.release.outputs.release_created }}