Add GitHub Actions workflow file to run CI

Author: lumaxis

.github/workflows/test.yml

@@ -0,0 +1,29 @@
+name: Run tests
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+
+      - uses: actions/[email protected]
+        with:
+          node-version: 18
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test