automate npm publish

.github/workflows/ci.yml

@@ -0,0 +1,38 @@
+name: CI
+on: push
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 12
+      - run: yarn
+      - run: yarn
+        working-directory: ./sample
+      - name: Run tests
+        uses: GabrielBB/xvfb-action@v1.0
+        with:
+          run: yarn --cwd ./sample test
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 12
+          registry-url: "https://registry.npmjs.org"
+      - run: yarn
+      - run: yarn
+        working-directory: ./sample
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}