Technical requirements
The code for this chapter can be found here: https://github.com/PacktPublishing/Mastering-iOS-14-Programming-4th-Edition/tree/master/Chapter%201%20-%20Whats%20New.
If you want to try out Swift 5.2 features as you read through the chapter, you need to install Xcode version 11.4 or later: https://itunes.apple.com/app/xcode/id497799835.