Compilation error when building SDK 2.0+ in Xcode 15.0

[Jeehut]

Contrary to Apples documentation (see for example here), it seems some of the properties of a StoreKit.Transaction are NOT available in Xcode 15.0 or earlier. Our SDK currently states it needs at least Swift 5.9 (through the Package.swift manifest format spec) which corresponds to Xcode 15.0, but I just discovered Apple only introduced and back-deployed these fields in Xcode 15.1 (see release notes:

Thus, a user has reported issues when building in Xcode 15.0:

This should be fixed to continue supporting Xcode 15.0. The workaround until then is to upgrade to 15.1.