Add 'scikit-learn' to install_requires in setup.py

[jackjackk]

After installing Rhodium in a new venv, scikit-learn seems to be needed when importing everything.

Thanks

[peterqstorm]

I had the same exact issue.

When setting up the environment using a conda environment from scratch, I ran through the setup files as instructed. However, when attempting to use from scipy.optimize import brentq as root, I ran into the issue that sklearn wasn't installed.

I was able to install it using 'conda install scikit-learn' but wasn't sure if it was an issue on my end or with the automated setup files.

Thanks!

[dhadka]

Fixed in pyproject.toml