Issue/2486 cocoa pods errors

I update the NSURL+IDN project to support ARC and in the way update the podspec to the latest version, upgraded the code to modern Objective C and push the pod to the official CocoaPods repo.

After that I update the podfile in the main project to use the latest version of the NSURL+IDN.

I also update the Podfile and project to use the latest version of CocoaPods.