Support Laravel 5.6

Add support for Laravel 5.6

Author: sayaamirul

composer.json

@@ -9,7 +9,7 @@
     ],
     "require": {
         "php" : "^5.6|^7.0",
-        "illuminate/support": "~5.1.0|~5.2.0|~5.3.0|~5.4.0|~5.5.0"
+        "illuminate/support": "~5.1.x|~5.2.x|~5.3.x|~5.4.x|~5.5.x|~5.6.x"
     },
     "autoload" : {
         "psr-4" : {