Loosen required versions

[dfilan]

Loosens up requirements, allowing some newer versions of things. NB: I tried to follow the advice of running cd test && pytest --gpu but got an "unrecognized arguments" error:

ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: --gpu
  inifile: None
  rootdir: /home/daniel/vegans

[tneuer]

Will look at the failing tests and then merge

[dfilan]

FYI notebooks are running locally for me, so I think it might be a problem with the CI.