Run tests for all file types

Author: ihor-sviziev

.github/workflows/php.yml

@@ -51,4 +51,4 @@ jobs:
       run: vendor/bin/phpunit
 
     - name: Run code style suite
-      run: vendor/bin/phpcs --standard=Magento2 Magento2/ --extensions=php
+      run: vendor/bin/phpcs --standard=Magento2 Magento2/Helpers/ Magento2/Sniffs