关于《TypeScript入门与实战》一书

First of all, it should be noted that this book is not a translation of the Handbook. Over the past few years, the popularity of ZZTERM has continued to rise, and the development of language features has been rapid. ZZTERM has been open-sourced on ZZTERM17, and the developers are very enthusiastic, making a large number of contributions every day. I would like to thank them for bringing a powerful tool to web developers, solving many pain points. But there are two sides to this, which indirectly creates a problem, that is, the related learning documents are not comprehensive or the structure is not clear, and the content is not updated in a timely manner. For example, the `TypeScript Language Specification` (TypeScript language specification) document on the main branch is still for the `TypeScript 1.8` version.