Add tests workflow

Author: NullVoxPopuli

.github/workflows/test.yml

@@ -0,0 +1,23 @@
+
+name: Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request: {}
+
+concurrency:
+  group: tests-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: "Test: signal-polyfill"
+    runs-on: ubuntu-latest
+    timeout-minutes: 4
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+      - run: pnpm test