Add github action

.github/workflows/ci.yaml

@@ -0,0 +1,31 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+ build-test:
+   runs-on: ubuntu-latest
+
+   steps:
+     - name: Checkout Code
+       uses: actions/checkout@v2
+
+     - name: Install composer and dependencies
+       uses: php-actions/composer@v6
+
+     - name: PHPUnit Tests
+       uses: php-actions/phpunit@v3
+       env:
+         XDEBUG_MODE: coverage
+       with:
+         bootstrap: vendor/autoload.php
+         configuration: phpunit.xml
+         php_extensions: xdebug
+         args: tests --coverage-clover ./coverage.xml
+
+     - name: Upload to Codecov
+       uses: codecov/codecov-action@v2
+       with:
+         token: ${{ secrets.CODE_COV_TOKEN }}
+         files: ./coverage.xml
+         verbose: true