ng build cause warnings with pseudo-selectors in :is/:where

`ng build` inlines critical css but causes warnings when using pseudo selectors inside a :is or :where.

This is not a breaking bug. Usually this only involves states of elements, which is not necessary for critical css. However, it might exclude a state that is relevant. Maybe you consider this out of scope?

🔬 Minimal Reproduction

https://github.com/kyubisation/ng-pseudo-selector-inlining

Place the following in styles.css:

.example:is(:hover, .active) {
  color: green;
}

🔥 Exception or Error

⠋ Generating index html...1 rules skipped due to selector errors:
  :where(.example):is(,.active) -> Empty sub-selector

[ShiJuuRoku]

+ combinator seem to produce same warning router-outlet + *

[developit]

@hiepxanh best thing to do would be to check for an update in the css-select npm module, which is what Critters uses to parse selectors.