replace yii object with baseobject

frontend/models/ProductSaleForm.php

@@ -8,7 +8,7 @@ use common\models\Card;
 use common\models\Customer;
 use common\models\Product;
 use common\models\Transfer;
-use yii\base\Object;
+use yii\base\BaseObject;
 use common\models\Account;
 use common\models\Discount;
 use common\models\Currency;