[BUG] Incompatibility with pygments 2.21.0

[frenzymadness]

I'm updating pygments to 2.21.0 in Fedora Linux and some of the tests of rich fail:

I cannot paste the output here because it's too long, thanks to the large diffs.

[mdaniels5757]

Patch updating pygments and the tests: https://gist.github.com/mdaniels5757/d2d48e8a5478b7b875b454b1237d3874 (I'd make a PR if I could.)