Deployment target triggers a compiler warning in Xcode 12+

[parrotbait]

Xcode 12 dropped support for iOS 8:
https://developer.apple.com/documentation/xcode-release-notes/xcode-12-release-notes

When compiling the project in Xcode for the simulator I get the following warning:

The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.0.99.

I can see that from the xcconfig file that deployment target is explicitly set to 8.0:
https://github.com/spotify/SPTPersistentCache/blob/master/ci/spotify_os.xcconfig#L21

I've increased to 12.0 locally for my project and it all builds ok. However I do not want to deviate the fork from the Spotify repo.

Would it be possible to bump to 9.0 at least please?