fix(gulp-util): add chalk as a dependency (#20976)
fix(gulp-util): add chalk as a dependency (#20976)

As of `chalk@2.2.0` (https://github.com/chalk/chalk/releases/tag/v2.2.0)
the project is providing it's own type definitions. See the specific
commit below for more details.

https://github.com/chalk/chalk/commit/f653b061d6fbdb1c7224f7d80476391202c47877
alexdresko/DefinitelyTyped,magny/DefinitelyTyped,mcliment/DefinitelyTyped,arusakov/DefinitelyTyped,magny/DefinitelyTyped,chrootsu/DefinitelyTyped,rolandzwaga/DefinitelyTyped,benishouga/DefinitelyTyped,rolandzwaga/DefinitelyTyped,AgentME/DefinitelyTyped,aciccarello/DefinitelyTyped,AgentME/DefinitelyTyped,aciccarello/DefinitelyTyped,arusakov/DefinitelyTyped,AgentME/DefinitelyTyped,one-pieces/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,benishouga/DefinitelyTyped,borisyankov/DefinitelyTyped,benishouga/DefinitelyTyped,zuzusik/DefinitelyTyped,arusakov/DefinitelyTyped,dsebastien/DefinitelyTyped,jimthedev/DefinitelyTyped,AgentME/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,georgemarshall/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,jimthedev/DefinitelyTyped,laurentiustamate94/DefinitelyTyped,zuzusik/DefinitelyTyped,georgemarshall/DefinitelyTyped,benliddicott/DefinitelyTyped,zuzusik/DefinitelyTyped,chrootsu/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,aciccarello/DefinitelyTyped,jimthedev/DefinitelyTyped,dsebastien/DefinitelyTyped,markogresak/DefinitelyTyped,borisyankov/DefinitelyTyped,alexdresko/DefinitelyTyped