Targetting OS builds and phone

When using Phonegap Build you target OSs (like iOS 7+ or Android 4+) in your config,xml

I’m doing the same now but the Cordova docs about this are really, really poor and the only reason I know about it is because of my PGB experience. Will it work with vanilla Cordova/Ionic?

I’d also like to target my app for iPhone 5 and above only. iPhone 4Ss have iOS8 but I don’t want my app on iPhone 4s because the iOS interface is not build for the tiny screens on them (I really don’t know how people coped!).

Is there a way to do this from config or do I have to do it from iTunes Connect somehow?