gtkimageview: Not a bump as such. It has or will have a new site (WIP) and the old
source url is ta ta. Checked with arch linux and Redhat and their tarball sha1 does not
match ours. Their https://github.com/GNOME/gtkimageview does show activity since our
last bump 4+ years ago. Seems one of those changes that never gets a new version number.