Allow ~2.1 Elastica

Author: XWB

composer.json

@@ -17,7 +17,7 @@
         "symfony/console": "~2.1",
         "symfony/form": "~2.1",
         "symfony/property-access": "~2.3",
-        "ruflin/elastica": "~2.1,<2.3",
+        "ruflin/elastica": "~2.1",
         "psr/log": "~1.0"
     },
     "require-dev":{