Fix the version of process_nwb==0.1.0 in setup.py

[emilyps14]

process_nwb has new changes that aren't backwards compatible -- it hasn't been updated on pypi/pip yet, but presumably it will eventually. We should fix the version number in setup.py so that developers don't accidentally get the wrong version when running pip install -e .

[jessierliu]

This finally happened, but it is fixed by the addition of -r requirements.txt to the environment .yml files in #129 . So can be closed if that PR is approved. @bendichter