Oops, you're right. jcupitt is the creator and principal maintainer of libvips, but I guess I linked to his "personal copy" git repo (which comes up first on google!).
You linked to a git repo, I linked to docs, but here's docs with internal links to the 'official' repo.
You linked to a git repo, I linked to docs, but here's docs with internal links to the 'official' repo.
https://libvips.github.io/libvips/