Update main.yml

.github/workflows/main.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  pull_request:
+    branches: 
+    - master
+  push:
+    branches:
+    - master
+
+jobs:
+  test:
+    name: Test on node ${{ matrix.node_version }} and ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node_version: ['8', '10', '12']
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js ${{ matrix.node_version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node_version }}
+
+    - name: npm install, build and test
+      run: |
+        npm ci
+        npm run lint
+        # npm test