community/libdisplay-info: upgrade to 0.2.0

https://lists.freedesktop.org/archives/wayland-devel/2024-June/043678.html

This has been out since the 20th of June and the next KWin release needs it. Since the last change to this package was me moving it to community a year or so ago I'm assuming this package isn't maintained any more (CC @bl4ckb0ne) so I'll be taking it over.