run tests in github action (#31)

* add ci config

* .

.github/workflows/node.js.yml

@@ -0,0 +1,22 @@
+name: Run tests
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          cache-dependency-path: |
+            package-lock.json
+          node-version: "18.x"
+          cache: "npm"
+      - run: npm i
+      - run: npm ci
+      - run: npm test
+