PHP 5.5 is now required

Author: adityapatadia

composer.json

@@ -12,7 +12,7 @@
     }],
     "require":
     {
-        "php": ">=5.4.0",
+        "php": ">=5.5.0",
         "ext-gd": "*",
         "ext-fileinfo": "*"
     },
@@ -42,4 +42,4 @@
         "ext-exif": "*",
         "ext-gd": "*"
     }
-}
+}