Log Message:
py-patsy: updated to 0.5.6

v0.5.6
* Avoid using deprecated `is_categorical_dtype` from `pandas` at all in pandas \ 
>=0.25.
* Avoid using deprecated `numpy.row_stack` in favor of `numpy.vstack`.

v0.5.5
* Handle deprecation of `_is_categorical_dtype` in `pandas`.
* Replace `numpy.issubsctype` usage with `numpy.issubdtype` for compatibility \ 
with `numpy` 2.0.