Add CI

.github/workflows/CI.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: php-actions/composer@v6
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - run: npm i
+      - run: composer install
+      - run: composer test
+      - run: composer error-format-test