scikit-learn in pip requirement file

[QueenMABhydro]

Hi,

I'm following your instructions for installing AI-Feynman. pip install aifeynman doesn't work because it calls pip install sklearn during the installation, and this command is deprecated (it should be pip install sciait-learn now). Alternatively, I guess I can probably install AI-Feynman directly from Github, but given that you provide installation instructions, I thought it would be easier just to follow them. I am interested in trying to use AI-Feynman as a diagnostic tool for problems in hydrological models (or components of hydrological models).