September 10, 2019
You can now submit apps built with Xcode 11 GM seed using the iOS 13 SDK to the App Store. You can also submit apps built with Xcode 11 GM seed using the SDK for watchOS 6 beta 9 and tvOS 13 beta 10 for internal and external testing.
Starting with Xcode 11, Application Loader is no longer included in Xcode. For details on how to upload your apps to App Store Connect using Xcode, see Xcode Help.