ci(gha): add config

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - v*
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test-linux:
+    name: Node ${{ matrix.node }} on ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest, macOS-latest ]
+        node: [ '12', '10', '8' ]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v1
+      - name: Setup node
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+      - run: npm install
+      - run: npm install --global npx
+      - run: npm test
+      - run: npm run coverage