Update or remove homepage URL as projects.gnome.org will be killed soon
https://gitlab.gnome.org/GNOME/gnome-power-manager/blob/master/gnome-power-manager.doap and https://gitlab.gnome.org/GNOME/gnome-power-manager/blob/master/README link to https://projects-old.gnome.org/gnome-power-manager/ which will be dead soon as per https://mail.gnome.org/archives/desktop-devel-list/2018-December/msg00011.html