We have implemented lots of changes to support Swift 4.2, with more updates on the way!
- Support for #warning and #error compiler directives.
- Support for changes to implicitly unwrapped optionals.
- Updated method, enum, struct and class names for Swift 4.2, iOS 12, macOS Mojave, watchOS 5 and tvOS 12.
Swift 5 is coming early next year, with a focus on ABI stability, along with changes to improve the overall usability of Swift. We will be updating Swiftify to support Swift 5 as soon as a developer beta is available.