Add sitemap service alias to provides method to prevent BindingResolu…

…tionException

Because the service provider is deferred, we need to tell the application that it provides the Sitemap class in order to inject it properly.

src/Roumen/Sitemap/SitemapServiceProvider.php

@@ -1,6 +1,7 @@
 <?php namespace Roumen\Sitemap;
 
 use Illuminate\Support\ServiceProvider;
+use Roumen\Sitemap\Sitemap;
 
 class SitemapServiceProvider extends ServiceProvider
 {
@@ -51,7 +52,7 @@ public function register()
             return new Sitemap($config);
         });
 
-        $this->app->alias('sitemap','Roumen\Sitemap\Sitemap');
+        $this->app->alias('sitemap', Sitemap::class);
     }
 
     /**
@@ -61,6 +62,6 @@ public function register()
      */
     public function provides()
     {
-        return ['sitemap'];
+        return ['sitemap', Sitemap::class];
     }
 }