feat: support Netlify

[ehmicky]

This adds support for Netlify.

Netlify build logs supports some ANSI sequences using ansi_up which supports OSC hyperlinks.

However, Netlify sets the CI enviroment variable, which makes this library return false.

This PR adds support for Netlify by detecting it with the NETLIFY environment variable.

[jamestalmage]

@ehmicky - I'm going to assume you've verified this works with Netlify

[ehmicky]

Hi @jamestalmage, absolutely!

Every Netlify build is defining this NETLIFY environment variable.
OSC hyperlinks are supported in the Netlify build logs 👍

[jamestalmage]

Perfect. Thank you!

[ehmicky]

🎉

For future reference, this is an example of using hyperlinks in Netlify build logs.

Netlify build logs is using ansi_up to convert ANSI sequences to HTML. It seems like there is a bug with OSC hyperlinks when the text includes a space. I filed an issue in drudru/ansi_up#65

[jamestalmage]

Published as 2.2.0

[ehmicky]

Thanks!

FYI, the bug above got fixed 👍