mehalter [1] filed an orphan request for heroku-cli [2]:

This package has been flagged out of date for about a month. If you
are no longer interest in maintaining the package, I am more than
happy to pick it up as maintainer!

[1] https://aur.archlinux.org/account/mehalter/
[2] https://aur.archlinux.org/pkgbase/heroku-cli/