MAGETWO-93806: [Forwardport] Use price index to calculate price for configurable products

Author: duhon

app/code/Magento/ConfigurableProduct/Model/ResourceModel/Product/LinkedProductSelectBuilderComposite.php

@@ -3,6 +3,8 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\ConfigurableProduct\Model\ResourceModel\Product;
 
 use Magento\Catalog\Model\ResourceModel\Product\LinkedProductSelectBuilderInterface;