Fix #111: Create workflow for build and lint

.github/workflows/main.yml

@@ -0,0 +1,30 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: "12.x"
+
+    - run: npm ci
+    - run: npm run build
+    - run: npm run lint
+
+    # TODO install mercurial and run tests on multiple platforms
+    # - run: npm test