Module should allow to write to stream

[SBoudrias]

Right now this module writes directly to process.stdout. I believe it'd be better if it wrote to a given stream.

[sindresorhus]

Why? The cursor is only on stdout. What's your use-case?

[SBoudrias]

This is true, but having it on a custom stream could allow you to pipe the output somewhere else, and ease testing in isolation.

I'm actually not sure how much it'll actually help, I'm still toying around concepts to easily test cli programs.

[sindresorhus]

This was fixed in 750b9a5.