Significant OpenAPI Updates

Dear Developer,

Please see below for the recent significant API updates:

- Optimized API

• item.GetCategories & item.GetAttributes

Added translation funtion and "language" field in input to select the language.

• item.GetAttributes

Made shopid an optional input. Together with GetCategoriesByCountry, developer can fetch all countries' categories and attributes without specifying any shop now.

• item.GetItemDetails

Added discount_id field in output. Developer can retrieve the associated discount info for items.

• item.Add & item.UpdateItem

Allow input 0 for shipping_fee when fee type is CUSTOM_TYPE.

- OpenPlatform

• Push Mechanism

Support proactively push order status updates to developer's callback url. Only applicable to developer with partnerID generated through APP. Old developers can register on our platform and apply new partnerID to take advantage of this feature. More instructions: https://open.shopee.com/documents?module=63&type=2&id=55

- Bug Fixed

• [TW] Bundle deal order returned inaccurate item and price details in GetReturnList
• Max price error when batch update item price