Swift 3 @objc inference in Swift 4 mode is deprecated.

[JacksonArthurClark]

Xcode 9 gives the error:
Showing Recent Issues
The use of Swift 3 @objc inference in Swift 4 mode is deprecated. Please address deprecated @objc inference warnings, test your code with “Use of deprecated Swift 3 @objc inference” logging enabled, and then disable inference by changing the "Swift 3 @objc Inference" build setting to "Default" for the "FlappyBird" target.

Should be a pretty easy fix, I'll get right on it and should have it done very shortly, at the very most by tonight (if I can't do it before the day starts) that is unless of course somebody else does it.