Add a license to allow commercial use

[benjipetit]

Hello! I found your library on Cocoapods and would like to use it in my project. Unfortunately, I can't at the moment, because there is no license.

Since you published the pod, I was wondering if it might be a mistake? If that's the case, maybe you can add a license that allows other developers to use your pod in their app. You can find more information here if needed:
https://docs.github.com/en/github/creating-cloning-and-archiving-repositories/licensing-a-repository

Thanks!