Missing dependency - scikit-image

[oesteban]

After downloading and installing, the execution of:

python scripts/find_outliers.py data

fails unless skimage is installed (thanks to @effigies for spotting this issue).

Please add the dependency to the pyproject.toml.

Then, I would suggest removing the requirements.txt file, as duplicity in responsibilities is a bad idea (cc @matthew-brett @effigies for insights on whether the presence of a requirements.txt file was suggested by us, or if there's something I'm missing).

[effigies]

I believe we had suggested a requirements.txt file. It is definitely simple and allows you to do testing if you manage to break your package, but you're right that there is a synchronization cost.