fix styles

Author: mostafamaklad

src/Helpers.php

@@ -139,7 +139,7 @@ public function checkVersion(): bool
      */
     public function flattenArray(array $items): array
     {
-        return collect($items)->map(function($item) {
+        return collect($items)->map(function ($item) {
             return is_string($item) ? explode('|', $item): $item;
         })->flatten()->all();
     }