New --line-ranges optin for black

[kuator]

Black added an option for range formatting: psf/black#4020
The problem is it has one option to specify both rowStart and rowEnd.
I tried something like black --no-color -q ${--line-ranges=rowStart-rowEnd} -, but it doesn't work and instead formats the entire file. And yes, I set formatCanRange to true

[kuator]

Nevermind, here's the solution: #251