add github workflow

Author: delabiejochen

.github/workflows/test.yml

@@ -0,0 +1,21 @@
+name: Test Changes
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x, 16.x]
+    steps:
+      - name: Clone Repository
+        uses: actions/checkout@v2
+      - name: Setup Node version
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: npm install
+      - name: Run tests
+        run: npm test