Colour support on TravisCI #92

I'm currently working on a package where I'm planning on switching to chalk and up to now TravisCI didn't have any problems with colours on the console (using colors) but after pushing some code with passing tests (on the chalk-based codebase), Travis seems to disable colours which make all the tests fail.

I've understood from this comment that TravisCI seems to non-determistically change supports-color but I'm unsure if there's a fix for that or if I have to manually enable it using chalk.enable = true or even set the chalk.level to something other than 0 (which is what I get on the TravisCI log).

EDIT: if (!chalk.enabled) chalk.enabled = true; doesn't help.