Fix !important selectors not being classified as valid class inside safelist config

[akbng]

This PR resolves issue #9759

PR includes

• add the '!' prefix as a valid class inside safelisting options
• include tests for the same

[thecrypticace]

Hey, thanks for the PR! Could you add an additional check that the regex pattern contains the ! character anywhere? We're good with adding this but don't want people to pay for the perf penalty of checking basically doubling the generated classes if they don't need them.

[akbng]

Hey, thanks for the PR! Could you add an additional check that the regex pattern contains the ! character anywhere? We're good with adding this but don't want people to pay for the perf penalty of checking basically doubling the generated classes if they don't need them.

sure I can try that and also saw some failing tests as well - will try to fix them 👍

EDIT: Looks like I need a different strategy like you suggested without conflicting with other checks

[thecrypticace]

If you do that you won't need to fix the failing tests :)

[thecrypticace]

Actually, I've already got an implementation. Lemme push it

[akbng]

Thanks for the help

[thecrypticace]

Thank you! 🎉

[akbng]

WOW! I didn't expected such fast action