added github workflow

Using UI since CLI doesn't seem to work

.github/workflows/main.yml

@@ -0,0 +1,34 @@
+name: Node CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [6.x, 8.x, 10.x, 12.x]
+
+    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 ci
+      run: npm ci
+
+    - name: Pre-Test
+      run: |
+        npm run lint
+
+        npm run test-headless -- --chrome $(which google-chrome-stable) --allow-chrome-as-root
+        npm run test-webworker -- --chrome $(which google-chrome-stable) --allow-chrome-as-root
+        npm run test-esm-bundle
+      if: matrix.node-version == '10.x'
+
+    - name: npm test
+      run: npm run test-node
+