Fix color detection in edge runtime

[alexeyraspopov]

Per @brillout's comment here: #54 (comment) Edge Runtime has following constraints:

• require is undefined
• process.argv is undefined

Here I'm trying to fix this without blowing out the size of the package

picocolor.js size goes from 2594B to 2600B.

Closes #54

[alexeyraspopov]

@ai @brillout feel free to raise any concerns or suggestions before I merge and publish v1.0.1.

[brillout]

I ain't familiar with Vercel's Edge runtime; I don't know whether your version works as well.

FYI this is the fork I'm using: brillout/picocolors@efd8707...main — you may like some of it.

[hydRAnger]

@alexeyraspopov

thanks for the fix, I'd like to know do we have any plan to publish it on npm?
seems the current code is still outdated: https://www.npmjs.com/package/picocolors?activeTab=code

[hydRAnger]

btw, shall we also handle scenarios when process is undefined? (like in the browser)

env = typeof process !== 'undefined' ? process.env : {};

or would you like me to make another PR?