Update jms serializer

Author: cursedcoder

composer.json

@@ -7,7 +7,7 @@
     "require": {
         "php": ">=5.5",
         "react/react": "0.4.1@dev",
-        "jms/serializer": "0.17.*@dev",
+        "jms/serializer": "^1.1",
         "doctrine/collections": "1.2.*@dev",
         "symfony/process": "2.6.*@dev",
         "concerto/comms": "~0.8"