add ci tests

.github/workflows/test.yml

@@ -0,0 +1,20 @@
+name: Test
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [macos-14, ubuntu-latest, windows-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+      - run: npm install
+      - run: npm test