Install error

[Nic Wayand]

Hi @duncanwp, first thanks for writing this great package!

I got the below error upon installing with:
pip install .

error in collocate setup command: 'extras_require' must be a dictionary whose values are strings or lists of strings containing valid project/version requirement specifiers.

Help online suggested updating setuptools but that didn't work for me.

Removing extras_require=optional_dependencies, in setup.py temporarily allowed successful installation. Maybe you or someone else with better knowledge of dependency syntax can help?

[Duncan Watson-Parris]

No problem - I hope it's useful!

Thanks for pointing this out, it should be fixed now in the latest version.