prompt: Skip optional fields on empty submit

[marionebl]

From @fahrradflucht

It would be great if one wouldn't have to write :skip every time to submit optional fields. I think submitting an empty input field should be enough to skip a section.

[marionebl]

This is tied to the current implementation of @commitlint/prompt using vorpal - I could not find a way to do this.

I'm leaning towards reimplementing @commitlint/prompt with something like vadimdemedes/ink at some point, will address this then.

[lostintangent]

Huge +1! I’m really loving commitlint, but this proposal would definitely improve he usability of prompt, as a replacement for commitizen.

[danielo515]

I'm on the same situation as @lostintangent
I was using commitizen, but I find commitlint far superior, but it is much less agile than commitizen, which allows you to skip an optional parameter with just an enter keystroke.