Update composer.json

Author: WBerredo

composer.json

@@ -18,7 +18,7 @@
         "friendsofsymfony/rest-bundle": "~1.4",
         "jms/serializer-bundle": "0.13.*",
         "nelmio/cors-bundle": "1.3.*",
-        "nelmio/api-doc-bundle": "~2.7"
+        "nelmio/api-doc-bundle": "~2.7",
         "nelmio/cors-bundle": "~1.3"
     },
     "autoload": {