StoreKit iOS 13.6 to 14.0 API Differences

SKAdNetwork.h
SKError.h
SKOverlay.h
Added SKOverlay
SKOverlayConfiguration.h
SKOverlayTransitionContext.h
SKPaymentQueue.h
SKProduct.h
SKStoreReviewController.h
AvailabilityReplacement
FromAvailablenone
ToDeprecated-[SKStoreReviewController requestReviewInScene:]

StoreKitDefines.h
Added #def SK_CLASS_FINAL