Load default config file without requiring it to be published.

This will fix line #40 not working, if config file isn't published.

Author: mikebronner

src/LaravelFilemanagerServiceProvider.php

@@ -51,6 +51,8 @@ public function boot()
      */
     public function register()
     {
+        $this->mergeConfigFrom('config/lfm.php', 'lfm-config');
+
         $this->app->singleton('laravel-filemanager', function () {
             return true;
         });