add github ci check

.github/workflows/tests.yml

@@ -0,0 +1,28 @@
+name: tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+env:
+  CI: 'true'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Use Node.js 16
+        uses: actions/setup-node@master
+        with:
+          node-version: 16
+      - name: install
+        run: |
+          yarn
+      - name: test
+        run: |
+          yarn test