feat: skip phpcs warnings in CI

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

includes/tests/static-analysis.yml

@@ -42,7 +42,7 @@ phpstan:
 phpcs:
   extends: .static-analysis
   script:
-    - vendor/bin/phpcs --report-junit=phpcs-junit.xml --report-full
+    - vendor/bin/phpcs --warning-severity=0 --report-junit=phpcs-junit.xml --report-full
   allow_failure: true
   rules:
     - !reference [.skip-mr, rules]