Update README.md

Author: skydiver

README.md

@@ -12,12 +12,12 @@ Materialize CSS Framework for Laravel 5 [http://materializecss.com/]
 
 * After updating composer, add ServiceProvider to the providers array in config/app.php
 ```php
-    'Skydiver\LaravelMaterializeCSS\MaterializeCSSServiceProvider',
+    Skydiver\LaravelMaterializeCSS\MaterializeCSSServiceProvider::class,
 ```
 
 * Add Facade to the aliases array in config/app.php
 ```php
-	'MaterializeCSS' => 'Skydiver\LaravelMaterializeCSS\MaterializeCSS',
+	'MaterializeCSS' => Skydiver\LaravelMaterializeCSS\MaterializeCSS::class,
 ```
 
 *  Then publish the package's assets to public folder: