VSCode warns about using referenced projects without been composite

[VitorLuizC]

Every time a open the CLI package the VSCode warns me about an incorrect tsconfig.json that uses project references without having composite enabled. After looking at the docs I've confirmed that VSCode is right.

Link of TS's project references docs:
https://www.typescriptlang.org/docs/handbook/project-references.html#composite

Since tests/tsconfig.json is only used by test runner we don't see any error in the console, but for long term this may cause some troube.