Add support Laravel 6.* (#658)

* Add support Laravel 6.1.0

* Support Laravel 6.x

Author: ahmadmayahi

composer.json

@@ -13,7 +13,7 @@
     ],
     "require": {
         "php": ">=7.1.0",
-        "laravel/framework": "~5.2.0||~5.3.0||~5.4.0||~5.5.0||~5.6.0||~5.7.0||~5.8.0||~6.0.0"
+        "laravel/framework": "~5.2.0||~5.3.0||~5.4.0||~5.5.0||~5.6.0||~5.7.0||~5.8.0||^6.0"
     },
     "require-dev": {
         "orchestra/testbench-browser-kit": "~3.4|~3.8|~4.0",