ci: add action to publish package on release creation

Author: dangreen

.github/workflows/publish.yml

@@ -0,0 +1,26 @@
+name: Publish Package
+on:
+  release:
+    types: [created]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v2
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2.0.1
+        with:
+          version: 6
+      - name: Install Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: 14
+          cache: 'pnpm'
+          registry-url: 'https://registry.npmjs.org'
+      - name: Install dependencies
+        run: pnpm install
+      - name: Publish
+        run: pnpm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}