fix doctrine-common dependency for 2.3 version

Author: Michal Piotrowski

composer.json

@@ -10,6 +10,7 @@
         "php": ">=5.3.3",
         "symfony/symfony": "2.3.*",
         "doctrine/orm": ">=2.2.3,<2.4-dev",
+        "doctrine/common": ">=2.2.3,<2.4-dev",
         "doctrine/doctrine-bundle": "1.2.*",
         "twig/extensions": "1.0.*",
         "symfony/assetic-bundle": "2.3.*",