Tbaile [1] filed an orphan request for papyrus [2]: The package is extremely out of date, last version is 2020-06 (according to Eclipse Papyrus website). As other comments says there's not much work to do to update the PKGBUILD, but the maintainer is not responding since 2017.
[1] https://aur.archlinux.org/account/Tbaile/ [2] https://aur.archlinux.org/pkgbase/papyrus/
