Replace jQuery.once with drupal/once

@jofitz
You didn't fix it well at all. It must be added once to the library. in js it has to import once. and it must use $().each and not once.forEach, because it uses $(this). Remove your merge request and fixed with my patch

Couldn't apply patch from #4, so re-adding

Patch in #5 works great. I'm setting this as RTBC!

Extra things done:
- Updated the MR to match its changes
- Changed the info.yml file since according to the documentation → the core/once is not available before 9.2.0; this means the new version won't support Drupal 8.8.

Also attaching patch from latest MR diff.

Resolved conflict and rerolled.
The conflict was related to the main module not supporting Drupal version 9 anymore. So it should normally be RTBC.