Initiated and tided go mod
It is something like a composer in a Go world https://blog.golang.org/using-go-modules
I don't this it's a good solution to tie library to the concrete implementation of libgit2, but I don't understand how it could work without go.mod either. I have no much experience here.
I don't know what to do with this. Please, use your supperpower to close it or continue by comment.
If you have projects that do not build in module-aware mode, now is the time to migrate. https://go.dev/blog/go116-module-changes cc @fabpot
This is included in #66, so it could be closed…