make laravel 5.4 support

Author: nahid

composer.json

@@ -12,8 +12,8 @@
     ],
   "require": {
     "php": ">=5.5.9",
-    "illuminate/contracts": "5.0.* || 5.1.* || 5.2.* || 5.3.*",
-    "illuminate/support": "5.0.* || 5.1.* || 5.2.* || 5.3.*",
+    "illuminate/contracts": "5.0.* || 5.1.* || 5.2.* || 5.3.* || 5.4.*",
+    "illuminate/support": "5.0.* || 5.1.* || 5.2.* || 5.3.* || 5.4.*",
     "sebastian-berc/repositories": "^1.0",
     "nesbot/carbon": "^1.21",
     "pusher/pusher-php-server": "^2.6"