Bugfix: reduce_df xcats can be string

[emhbrine]

No description provided.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (c0264ef) 78.75% compared to head (74e370a) 78.76%.
Report is 10 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1364      +/-   ##
===========================================
+ Coverage    78.75%   78.76%   +0.01%     
===========================================
  Files           62       62              
  Lines         5771     5774       +3     
===========================================
+ Hits          4545     4548       +3     
  Misses        1226     1226              

Files	Coverage Δ
macrosynergy/management/utils/df_utils.py	94.04% <100.00%> (+0.05%)	⬆️
macrosynergy/panel/category_relations.py	41.15% <0.00%> (ø)
macrosynergy/panel/view_ranges.py	57.14% <0.00%> (ø)