Drop support for sonata-project/form-extensions v1 (#1241)

Author: dmaicher

composer.json

@@ -25,7 +25,7 @@
         "doctrine/common": "^3.0",
         "psr/container": "^1.0 || ^2.0",
         "psr/log": "^2.0 || ^3.0",
-        "sonata-project/form-extensions": "^1.4 || ^2.0",
+        "sonata-project/form-extensions": "^2.0",
         "symfony/asset": "^6.4 || ^7.1",
         "symfony/config": "^6.4 || ^7.1",
         "symfony/console": "^6.4 || ^7.1",