Die, D6 random number creator using Gameplaykit

Die.swift

import GameplayKit

struct Die: Equatable {
    public static var roll: Int {
        if #available(iOS 9, *) {
            let d6 = GKRandomDistribution.d6()
            return (d6.nextInt())
        }
        else {
            let d6 = 6
            return Int.random(in: 1..<7)
        }
    }
}