Added GitHub actions workflow

.github/workflows/build.yml

@@ -0,0 +1,40 @@
+name: build
+
+on: [push, pull_request]
+
+jobs:
+
+  build:
+
+    strategy:
+      matrix:
+        virtual-environment: ['ubuntu-latest', 'macos-latest', 'windows-latest']
+        node: [8, 10, 12, 14, 16, 17]
+
+    runs-on: ${{ matrix.virtual-environment }}
+
+    steps:
+    - name: Configure git (Windows specific)
+      if: matrix.virtual-environment == 'windows-latest'
+      run: git config --global core.autocrlf false
+
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Add msbuild to PATH (Windows specific)
+      if: matrix.virtual-environment == 'windows-latest'
+      uses: microsoft/[email protected]
+
+    - name: Setup Node.js ${{ matrix.node }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node }}
+
+    - name: Install dependencies and build
+      run: npm install
+
+    - name: Run linter
+      run: node node_modules/eslint/bin/eslint .
+
+    - name: Run test suite
+      run: node node_modules/mocha/bin/mocha tests