FYI: install_requires error. Fix is upgrade setuptools

[Jason]

Full error:

error in Flask-WhooshAlchemyPlus setup command: 'install_requires' must be a string or list of strings containing valid project/version requirement specifiers

To resolve:

pip install --upgrade setuptools

Just wanted to add a issue encase anyone ran across the same thing.

[Renjie Cai]

thanks~