Add CocoaPods Support

[Sherlouk]

I'm fortunate that all of my personal and work projects support Swift Package Manager in some part which enables us to use this project.

I understand not everyone is in the same boat, so if anybody has the need for CocoaPods then feel free to let me know here and I can add compatibility for you.

I won't do it unless someone asks though, always preferable to keep things light and easy!