* define `aria-expanded` based on open/closed state
You shouldn't be able to open a Listbox/Menu/Combobox/... when the
component is in a disabled state, however if you open it, and then
disable it then it is still in an open state. Therefore the
`aria-expanded` should still be present.
This is also how other libraries behave.
It is also how the native `<select>` behaves. You can open it, disable
it programmatically and then you are still able to make a selection.
This seems enough evidence that this change is an improvement without
being a breaking change.
Fixes: #2602
* update changelog
Robin Malfait
1739edb479