accessibility

[Martl1]

would it be possible to implement accessibility in this package so a blind user can navigate and use the multi select field?
Specifically on Mac OS using VoiceOver, haven't tested on windows.
I have to use this package for my job on a project which has already implemented it. I can edit values that this package uses in the database but that is not always practical.
Right now VoiceOver detects the field as a text field, but arrowing up or down reads nothing, not sure if anything actually changes visually. I think it does because I managed to select options a few times but couldn't reproduce it consistently.
I am happy to test solutions if required. I'd appreciate it if this could be looked into, as I'm visually impaired and have to rely on screenreader to navigate everything.

[Tarpsvo]

PR-s are very welcome. Unfortunately, I do not have the time to work on this in the near future. This is quite a big rework.