DX: apply rector rules up to php8.0

src/Bundle/ChillMainBundle/Tests/TestHelper.php

@@ -21,14 +21,12 @@ class TestHelper
     /**
      * create a client authenticated with an user.
      *
-     * @param mixed $username
-     * @param mixed $password
      *
      * @return \Symfony\Component\BrowserKit\Client authenticated client
      */
     public static function getAuthenticatedClientOptions(
-        $username = 'center a_social',
-        $password = 'password'
+        mixed $username = 'center a_social',
+        mixed $password = 'password'
     ) {
         return [
             'PHP_AUTH_USER' => $username,