Is your feature request related to a problem? Please describe.
Level 4 CSS selector do not work on Stylus 0.55.0, (this was added on 0.58.0), since Stylus didn't reach 1.0 yet, major versions are still in middle numbers and being ignored, as of now, there is already a year gap since the latest release.

Describe the solution you'd like
Update Stylus to 0.59.0

Describe alternatives you've considered
There is no alternative solutions, it just has to be updated, maybe add support for minor versions?

How important is this feature to you?
Note: Important, level 4 selector are used in part of my components, they don't work without them.

Additional context
Nothing to add.