Move from getDates to array dates.

app/Models/Category.php

@@ -29,6 +29,7 @@ class Category extends Model
 
     protected $fillable = ['user_id', 'name'];
     protected $hidden   = ['encrypted'];
+    protected $dates    = ['created_at', 'updated_at', 'deleted_at'];
 
     /**
      * @param array $fields
@@ -58,15 +59,6 @@ class Category extends Model
 
     }
 
-    /**
-     * @codeCoverageIgnore
-     * @return string[]
-     */
-    public function getDates()
-    {
-        return ['created_at', 'updated_at', 'deleted_at'];
-    }
-
     /**
      * @codeCoverageIgnore
      *