fix lower version bounds

Author: xabbuh

composer.json

@@ -42,7 +42,7 @@
         "symfony/phpunit-bridge":         "~2.7|~3.0",
         "phpoption/phpoption":            "~1.1.0",
         "jms/serializer":                 "~0.13|~1.0",
-        "jms/serializer-bundle":          "~0.12|~1.0",
+        "jms/serializer-bundle":          "~0.11|~1.0",
         "sllh/php-cs-fixer-styleci-bridge": "^1.3"
     },
 
@@ -55,7 +55,7 @@
 
     "conflict": {
         "symfony/validator": ">=2.5.0,<2.5.5",
-        "jms/serializer": "<0.12",
+        "jms/serializer": "<0.13",
         "jms/serializer-bundle": "<0.11"
     },