CFPropertyList dependency

Just wanted to start a conversation here about the `CFPropertyList` dependency used. It uses a conflicting monkey patch method name as the standard `plist` gem (Hash.to_plist), and it's caused issues with `Fastlane`, which I opened a PR for. It makes me wonder if there's a way we can make these both work, either by removing the extension and using appropriate namespaces, or by maybe weighing them both and leaning on one collectively?

I'm not sure of the reasoning or advantages / disadvantages of using one or the other, I just wanted to start a friendly conversation about it :)