The following links are good resources for further information on TypeScript 3.0:
- The Microsoft blog post that announced the TypeScript 3.0 release is worth a read: https://blogs.msdn.microsoft.com/typescript/2018/07/30/announcing-typescript-3-0/
- The TypeScript documentation has got good information on project references, which is worth looking at: https://www.typescriptlang.org/docs/handbook/project-references.html