Minor fix

Author: bryanvimigo

src/Contracts/RepositoryInterface.php

@@ -7,7 +7,7 @@
 
 interface RepositoryInterface
 {
-    public function pluck($column, $key = null): Collection|array;
+    public function pluck($column, $key = null): mixed;
 
     public function sync($id, $relation, $attributes, $detaching = true): mixed;
 

src/Eloquent/BaseRepository.php

@@ -67,7 +67,7 @@ public function makeModel(): Model
         return $this->model = $model;
     }
 
-    public function pluck($column, $key = null): Collection|array
+    public function pluck($column, $key = null): mixed
     {
         return $this->model->pluck($column, $key);
     }