Xcode 12 compilation fix
Update dependencies for compilation with Xcode 12.
About Xcode 12 support
A proper iOS / tvOS 14 release will be made later. Until then, we recommend you ship your application with Xcode 11.7 if you can. The library can be compiled with Xcode 12 but has not been fully tested yet.
If you still intend to use Xcode 12, note there is an issue with Carthage with a workaround available. The next official release we will deliver will support Xcode 12 and replace Carthage with SPM.