mschu [1] filed a deletion request for shiboken-git [2]: last commit 4 years ago so no need for dev version
stable version provided by python2-shiboken (or python2-shiboken2?; not quite sure about the naming of the other pkgs) maybe there's also not much point in keeping https://aur.archlinux.org/packages/python2-shiboken2-git/ [1] https://aur.archlinux.org/account/mschu/ [2] https://aur.archlinux.org/pkgbase/shiboken-git/
