[part of RFC] DOM CSS selector support: querySelector(All), matches, closest

[nielsdos]

Part of a larger RFC: https://wiki.php.net/rfc/dom_additions_84
This implements: querySelector, querySelectorAll, matches, closest, i.e. the 4 CSS selector methods.

The largest part of this PR is reimporting the CSS component of Lexbor, which I left out on purpose in the HTML 5 PR because we did not need it at that time.

[TimWolla]

Updating Lexbor (which had file permission changes from 755 -> 644 so almost all files are touched).

Would it make sense to commit this already? Being a regular update it should be a simple PR and it would make this one likely much smaller.

[nielsdos]

Updating Lexbor (which had file permission changes from 755 -> 644 so almost all files are touched).

Would it make sense to commit this already? Being a regular update it should be a simple PR and it would make this one likely much smaller.

In number of files changed this would indeed be a drastic decrease (and hopefully prevent GitHub's UI from breaking again). In terms of number of additions the CSS component reimport is the primary source.
I'll PR the Lexbor update separately, and leave the CSS component in here for now. I'll do that later this week.

[TimWolla]

You forgot to add your name to ext/dom/CREDITS 😜

[Girgias]

I didn't have the most detailled look, but I can't see anything that stands out as weird