Canto is in maintenance mode.
This has come up a couple of times on Github and in the comments here, so it seems like an official post is in order. I actively use it, if it suddenly became incompatible with the latest Python 3, or someone reported a serious bug (like a security issue), I’d fix it. If someone cared to submit a patch / pull request, I’d consider it.
This site will remain up, with the docs and repos in their current state, but just to be crystal clear, I don’t have the motivation to work on this anymore.