1. Support for the new response filter (response_fields parameter) for platforms: Prestashop, Prestashop API, Woocommerce, WooCommerce API, Magento, Magento 2 API, Salesforce Commerce Cloud, Etsy API v3.
2. Product.variant.add method has been added for Shopware 6.
3. Added output of fields ("default_price", "cost_price", "list_price", "advanced_price") in the response of methods product.child_items.list and product.child_items.info for Bigcommerce.
4. The ability to change the API key has been added.
