add test workflow

.github/workflows/test.yml

@@ -0,0 +1,21 @@
+name: Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: latest
+          registry-url: https://registry.npmjs.org/
+      - name: Install dependencies
+        run: npm ci
+      - name: Run tests
+        run: npm test