Support laravel 5.3

Author: pi0

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=5.3.0",
-        "illuminate/support": "5.0.* || 5.1.* || 5.2.*",
+        "illuminate/support": "5.0.* || 5.1.* || 5.2.* || 5.3.*",
         "omnipay/common": "~2.0"
     },
     "autoload": {