[fix:fetch-task] gulp waits till the task finishes
[fix:fetch-task] gulp waits till the task finishes

The two tasks at hand are async and thus we must tell gulp when they
are done. They have been wrapped in a Promise.all to accomplish this.

buzinas/tslint-eslint-rules,buzinas/tslint-eslint-rules,buzinas/tslint-eslint-rules