Update iOS SDK to version 2.0.0

The new iOS SDK has the xcframework digitally signed and removed Bitcode, since now Apple rejects builds with Bitcode.

Breaking update: built with Xcode 15, which means you will need Xcode 15 or newer to build your application.
Breaking update: supports iOS version 12.0 and newer (iOS deployment target)
Breaking update: drop static library and dynamic framework builds.