Possible error in idtxl/stats.py

[WenhaoXuPhys]

When testing IDTxl according to the instructions by running python demos/demo_bivariate_mi.py after initially installing it via Conda, I encountered an error in the file idtxl/stats.py. Specifically, line 1535 raised an error:
if np.math.factorial(data.n_replications) > n_perm:
The error message stated that np.math.factorial does not exist.

To resolve this, I modified the code by importing Python’s built-in math module and replacing np.math.factorial with math.factorial. After this change, the code executed successfully.

Hope this makes sense.