PINOperation dependency updated to 1.2.1 to support xcframework build

[nickaroot]

Hey, there is awesome Carthage feature for Xcode 12+ (https://github.com/Carthage/Carthage#migrating-a-project-from-framework-bundles-to-xcframeworks) with no need to apply a workaround

PINOperation 1.2.1 fixes issues with xcframework build, that's important for PINCache and PINRemoteImage (I will create PINRemoteImage pull request with updated PINCache dependency at this repo)

It might be more correct to merge this changes to 'xcframework' branch of PINCache and PINRemoteImage