FileProvider macOS 11.1 to 11.3 API Differences

NSFileProviderDefines.h
Removed #def FILEPROVIDER_SPI_AVAILABILITY
Added #def FILEPROVIDER_API_AVAILABILITY_V3_1
NSFileProviderDomain.h
NSFileProviderError.h
NSFileProviderItem.h
NSFileProviderManager.h
NSFileProviderReplicatedExtension.h
NSFileProviderRequest.h
NSFileProviderTesting.h