Add publish workflow

Author: rjvim

.github/workflows/publish.yml

@@ -0,0 +1,19 @@
+name: Node.js Package
+on:
+  release:
+    types: [created]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: "12.x"
+          registry-url: "https://registry.npmjs.org"
+      - run: yarn install
+      - run: npm version patch
+      - run: yarn build
+      - run: npm publish --access public
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_PUBLISH_TOKEN }}