`:has` pseudo class is now supported by most browsers

[rakleed]

Update that the :has pseudo-class is now supported by most browsers. More: https://caniuse.com/css-has

https://github.com/AdguardTeam/AdguardKnowledgeBase/blob/master/01.general/02.how-to-create-your-own-ad-filters/docs.en.md#extended-css-has

[vbagirov]

We're still waiting for it to be internally implemented, it will likely be a part of this task: https://github.com/AdguardTeam/ExtendedCss/issues/110