N°8017 - Security - dependabot - Symfony's VarDumper vulnerable to un… (#731)

Upgrade all Symfony components to last security fix (~6.4.0)

lib/symfony/string/Slugger/SluggerInterface.php

@@ -23,5 +23,5 @@ interface SluggerInterface
     /**
      * Creates a slug for the given string and locale, using appropriate transliteration when needed.
      */
-    public function slug(string $string, string $separator = '-', string $locale = null): AbstractUnicodeString;
+    public function slug(string $string, string $separator = '-', ?string $locale = null): AbstractUnicodeString;
 }