Updaitng tests

.travis.yml

@@ -5,7 +5,6 @@ os:
   - windows
 
 php:
-  - 5.3
   - 5.4
   - 5.5
   - 5.6

composer.json

@@ -13,7 +13,7 @@
     ],
     "minimum-stability": "stable",
     "require": {
-        "php": ">=5.3.0",
+        "php": ">=5.4.0",
         "symfony/config": "~2.3|~3.0",
         "symfony/dependency-injection": "~2.3|~3.0",
         "symfony/filesystem": "~2.3|~3.0",