Remove @dev version of core-bundle

composer.json

@@ -32,7 +32,7 @@
         "sonata-project/jquery-bundle": "~1.8",
         "sonata-project/exporter": "~1.0",
         "sonata-project/block-bundle": "~2.2,>=2.2.7",
-        "sonata-project/core-bundle": "~2.2@dev",
+        "sonata-project/core-bundle": "~2.2",
         "doctrine/common": "~2.2",
         "knplabs/knp-menu-bundle": ">=1.1.0,<3.0.0",
         "knplabs/knp-menu": ">=1.1.0,<3.0.0"
@@ -54,4 +54,4 @@
             "dev-master": "2.2.x-dev"
         }
     }
-}
+}