Bugfix: CategoryRelations, fixed Pandas warnings

[Magnus167]

No description provided.

[codecov]

Codecov Report

Merging #965 (d217396) into develop (d9b674e) will increase coverage by 0.07%.
Report is 18 commits behind head on develop.
The diff coverage is 53.84%.

❗ Current head d217396 differs from pull request most recent head cbb9baf. Consider uploading reports for the commit cbb9baf to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #965      +/-   ##
===========================================
+ Coverage    63.73%   63.80%   +0.07%     
===========================================
  Files           40       40              
  Lines         4624     4636      +12     
===========================================
+ Hits          2947     2958      +11     
- Misses        1677     1678       +1     

Files Changed	Coverage Δ
macrosynergy/learning/panel_timeseries_split.py	0.00% <0.00%> (ø)
macrosynergy/panel/category_relations.py	36.20% <50.00%> (+0.22%)	⬆️
macrosynergy/panel/return_beta.py	75.00% <65.21%> (+1.14%)	⬆️