build: add publish script

Author: ej9x

.github/workflows/publish.yml

@@ -0,0 +1,20 @@
+name: publish
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 11
+          registry-url: 'https://registry.npmjs.org'
+      - run: |
+          npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}