Merge pull request #48 from alfa6661/contract

use Repository contract as type hint

Author: nWidart

src/Menu.php

@@ -4,7 +4,7 @@
 
 use Closure;
 use Countable;
-use Illuminate\Config\Repository;
+use Illuminate\Contracts\Config\Repository;
 use Illuminate\View\Factory;
 
 class Menu implements Countable

src/MenuBuilder.php

@@ -3,7 +3,7 @@
 namespace Nwidart\Menus;
 
 use Countable;
-use Illuminate\Config\Repository;
+use Illuminate\Contracts\Config\Repository;
 use Illuminate\View\Factory as ViewFactory;
 
 class MenuBuilder implements Countable