Merge branch '5.4' into 6.4

* 5.4:
  Replace external FTP server by a local docker instance
  [PhpUnitBridge][Console][VarDumper] Fix handling NO_COLOR env var

DeprecationErrorHandler.php

@@ -418,7 +418,7 @@ private static function hasColorSupport()
         }
 
         // Follow https://no-color.org/
-        if ('' !== ($_SERVER['NO_COLOR'] ?? getenv('NO_COLOR') ?: '')) {
+        if ('' !== (($_SERVER['NO_COLOR'] ?? getenv('NO_COLOR'))[0] ?? '')) {
             return false;
         }