kewl [1] filed a orphan request for iscan-plugin-v330 [2]:
This package has been abandoned for a while, the latest version from
Epson 1.0.1 of 6/2016 has never been updated and the maintainer is MIA
on this one and on another of his packages that has been flagged out
of date since 11-6-2017.
I tried to contact him.
I am happy to adopt the package and refresh it.
[1] https://aur.archlinux.org/account/kewl/
[2] https://aur.archlinux.org/pkgbase/iscan-plugin-v330/