No way to update specific vendored packages in isolation

[peterbourgon]

I'd like a way to update only specific vendored packages, rather than all packages at once. Ideally, the UX would be something like vendetta update github.com/specific/package. With the current flagset, I guess it would be vendetta -u github.com/specific/package.

[samv]

+1 - also related is vendoring just one dependency at a time.