Update laravel 5.3

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=5.4.0",
-        "illuminate/support": "5.0.*|5.1.*|5.2.*"
+        "illuminate/support": "5.0.*|5.1.*|5.2.*|5.3.*"
     },
     "autoload": {
         "psr-4": {