Should a new base github repo be created?

Hi there,
I can see the plugin had an update to 1.6.6 3 months ago, but I cannot see this on the referenced github repo (https://github.com/scribu/wp-posts-to-posts).

Is there a new base repo, where we can actively help develop, submit Pull Requests etc?

I have not used post2posts for years, but liked it, when I had to use it. Would be great to keep it working.