Update composer.json

fixed required lib min version

Author: webdevvie

composer.json

@@ -15,7 +15,7 @@
     "require": {
         "php": ">=5.3.0",
         "pda/pheanstalk": ">=2.1.0,<3.0-dev",
-		"jms/serializer-bundle": "0.13.*",
+	"jms/serializer-bundle": "~0.13",
         "symfony/process":"~2.4",
         "phploc/phploc": "*"
     },