They are independent enough from the rest of GNOME (mostly thanks to
gtk+ being LTS at 3.22 with no further major releases before gtk4),
and slight testing shows that for others the new libgit2-glib works
just fine with GNOME 3.22 versions like gedit-plugins and gnome-builder.
gitg-3.22 would probably work fine with the new libgit2-glib too, but
has an explicit safety MAX version check in configure, so just unleash
it too.
>=gnome-base/dconf-editor-3.23
>=dev-util/devhelp-3.23
>=mail-client/evolution-3.23
->=dev-libs/libgit2-glib-0.25
->=dev-vcs/gitg-3.23
>=gnome-extra/gnome-builder-3.23
>=games-board/gnome-mines-3.23
>=media-sound/gnome-music-3.23