Tests for draw functions

[maximelucas]

• tests for draw functions
• added defaults param values to all draw functions
• tests for clustering

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +5.62 🎉

Comparison is base (7cc3b6b) 84.32% compared to head (54556e6) 89.94%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #312      +/-   ##
==========================================
+ Coverage   84.32%   89.94%   +5.62%     
==========================================
  Files          35       35              
  Lines        2756     2796      +40     
==========================================
+ Hits         2324     2515     +191     
+ Misses        432      281     -151     

Impacted Files	Coverage Δ
xgi/drawing/draw.py	69.54% <100.00%> (+45.52%)	⬆️

... and 10 files with indirect coverage changes

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[nwlandry]

This looks good, thanks! A few things:

• I would be in favor of keeping it as net instead of H in nodestats, but if you feel strongly, make sure that it's consistent.
• If you could add a test to check that the nodes, lines, edges are plotted on the right layer, that would be awesome, but frankly what you have is a huge improvement, so no sweat if not.
• I think that someone mentioned that the clustering coefficient is not between 0 and 1. Can you add this as an issue?
• I like adding the optional arguments to the draw nodes/edges functions.

Overall looks great and I think I'm good with merging this!

[maximelucas]

All done. I had already raised issue #309 about the clustering coefficient :) We'll need to test it once the right answer is decided.