Add NetworkX 3 compatibility

[bdpedigo]

Wondering if there's any fundamental reason to disallow networkx 3? Happy to make a PR if it's just a matter of ensuring everything still works with the new API

[fcollman]

no nothing fundamental.. just differences in the api and some worry about forcing people to upgrade is just as bad as not upgrading, so then wanting to make it work with either is more work than we wanted to do.