feat: support NO_COLOR by updating kleur

[SpyTec]

Some terminals do not support colors and will output a bunch of
unnecessary clutter instead. kleur as of v4.1.0 support NO_COLOR
var which disables color completely

[lukeed]

This is already possible via NO_COLOR environment variable, which is far more standardized. And some of these terminals set that ENV automatically

[SpyTec]

Ah interesting, didn't know about that. Though it doesn't work

Got an npm start script with

sirv dist --cors --etag --single --host --port 8080

and running it with the NO_COLOR doesn't change anything. Still outputs color

$ NO_COLOR=true npm start

[SpyTec]

@lukeed Ah, kleur was outdated. Updated it to the latest version in the latest commit and changed the PR. From what I understand changing it from v3 to v4 shouldn't affect this repo

[SpyTec]

Hi @lukeed, wondering if you have time to look at this soon

[lukeed]

Hey, thanks. This is actually a breaking change because of the exports map within kleur@4.x
I'll merge this after the next round of changes for sirv too, which will also include other breaking changes