Check php linter

Investigate how we use CI and check private php libraries and/or drupal modules.

.gitlab-ci.yml

@@ -26,6 +26,7 @@ php-compatibility-83:
   variables:
     PHPVERSION: "8.3"
   script:
+    - phpcs --version
     - >-
       phpcs -s -p --colors
       --standard=PHPCompatibility