Support :is() and :where()

[marcoscaceres]

Now that they are universally supported....

https://drafts.csswg.org/selectors-4/#matches

[ylafon]

Hum, it was added since quite a while, but there is a bug (and bigger than expected)

[marcoscaceres]

Appreciate the update!

[ylafon]

work started on the selectors-4 branch, more soon!

[ylafon]

See bc50295 for :is() and :where(), 327615c for :has() need more work for complex selectors and it should be a good time to merge.

[ylafon]

Fixed by 60a34e6

[marcoscaceres]

Yay! Nice one @ylafon!!!