Bump php requirement

composer.json

@@ -18,7 +18,7 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0",
+        "php": ">=5.3.2",
         "justinrainbow/json-schema": "1.1.*",
         "seld/jsonlint": "1.*",
         "symfony/console": "2.1.*",