Update libgit2 to the 0.22.x series which brings in API/ABI changes (yay fun).
Update libgit2-glib to 0.22.x series to fix the build with libgit2 0.22.x.
Update gitg to 3.16.1 to make it build agains libgit2-glib 0.22.x.
Update py-pygit2 to 0.22.0.
Update rubygem-rugged to 0.22.1b1 which is a pre-release but it builds with