> Turns out other coauthors are not interested in spending any time on it
Because you open source it does not mean, AT ALL, that you need to spend time on it. I like Cap'n Proto as an example: it is a great open source project, but don't think of contributing to it: you will probably be ignored (unless you find and fix a very important bug, but good luck to find that there). And that's fine: the fact that it is open source is already great! Who would I be to expect the maintainers to work for free on top of open sourcing great work?
Because you open source it does not mean, AT ALL, that you need to spend time on it. I like Cap'n Proto as an example: it is a great open source project, but don't think of contributing to it: you will probably be ignored (unless you find and fix a very important bug, but good luck to find that there). And that's fine: the fact that it is open source is already great! Who would I be to expect the maintainers to work for free on top of open sourcing great work?