FIAPaymentQueueHandler.h:18:42: warning build: 'SKDownload' is deprecated: first deprecated in iOS 16.0 - Hosted content is no longer supported

[jmagman]

On iOS 16 beta 1 there is a new deprecation warning on these lines:
https://github.com/flutter/plugins/blob/04f64ec89b65f135fc43e8856af95b7d66e3e38a/packages/in_app_purchase/in_app_purchase_storekit/ios/Classes/FIAPaymentQueueHandler.h#L18
https://github.com/flutter/plugins/blob/04f64ec89b65f135fc43e8856af95b7d66e3e38a/packages/in_app_purchase/in_app_purchase_storekit/ios/Classes/FIAPaymentQueueHandler.m#L213
https://github.com/flutter/plugins/blob/04f64ec89b65f135fc43e8856af95b7d66e3e38a/packages/in_app_purchase/in_app_purchase_storekit/ios/Classes/InAppPurchasePlugin.m#L80

SKDownload is deprecated in iOS 16:
https://developer.apple.com/documentation/storekit/skdownload