colors disabled when -j is set and we are writing to a file

[mcollina]

As titled, we might probably want to override some stuff in chalk.

Chalk is disabled because of a check in https://github.com/chalk/supports-color/blob/master/index.js.

See https://github.com/chalk/supports-color/blob/master/index.js#L41-L43.

We can either internalize that check, or sending them a PR to expose that as a function that accepts a stream. Or maybe it's just a new module.

[GlenTiki]

I think that a pr is the best approach. Will do later 👍

[mcollina]

See also https://github.com/isaacs/color-support.