Typescript mismatch warning on build

[sinedied]

With new angular-cli versions, a warning is now emitted because the TypeScript version we use is too recent (2.4) compared to the @angular/compiler requirements (2.3).

As TS version was upgraded to 2.4 because there was significant changes between 2.3 and 2.4 and some projects had issues with 2.3 version (most due to libs broken with 2.3). For now, no issues have been reported by projects from using the 2.4 version, even though a warning is emitted.

To avoid confusion on this matter, this warning should be silenced until angular@5 that will come with official TS 2.5 support.