updated required php version, since earlier 5.3 versions are susceptible to (this bug)[https://bugs.php.net/bug.php?id=43200] that was fixed in 5.3.9

Author: jheys

composer.json

@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0",
+        "php": ">=5.3.9",
         "symfony/event-dispatcher": "~2.1"
     },
     "require-dev": {