Issue during installation

[Calogero Carlino]

Hi, I had some issue with the installation of gaston (pip install -e .).
I SOLVED by:

• removing pyproject.toml,
• adding a , (comma) at the end of line 21 of setup.py (after scikit-learn requirement).

[Uthsav Chitra]

Thank you for debugging! That is annoying that I was missing a comma in setup.py -- I just added it. Hopefully this fixes the issue.