Bump rector (#783)

composer.json

@@ -57,7 +57,7 @@
         "phpunit/phpunit": "^9.5",
         "psalm/plugin-phpunit": "^0.18",
         "psalm/plugin-symfony": "^5.0",
-        "rector/rector": "^0.18",
+        "rector/rector": "^0.19",
         "sonata-project/admin-bundle": "^4.28",
         "sonata-project/classification-bundle": "^4.0",
         "sonata-project/doctrine-extensions": "^1.0 || ^2.0",