chore: Add GitHub Actions workflow to publish to npm

Author: arinker

.github/workflows/publish.yml

@@ -0,0 +1,32 @@
+name: Publish to npm
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v2
+      with:
+        node-version: '14'
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Run build script
+      run: npm run build
+
+    - name: Update package version
+      run: npm version ${{ github.event.release.tag_name }} --no-git-tag-version
+
+    - name: Publish to npm
+      env:
+        NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+      run: npm publish