jsh6789 [1] filed a orphan request for pngout [2]:

Package has been not been updated and has been flagged out of date for at least 2 months. I would be able to maintain the package and am currently monitoring the upstream site.

[1] https://aur.archlinux.org/account/jsh6789/ [2] https://aur.archlinux.org/pkgbase/pngout/