Add test GitHub action

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: Node.js CI
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+      - run: npm install
+      - run: npm test
+        env:
+          CI: true