Fix catalogue filter with compiled regex

This started failing again with newer versions of pandas

Author: alihamdan

doc/Changelog.md

@@ -23,6 +23,7 @@ og:description: See what's new in the latest release of Roseau Load Flow !
 
 - {gh-pr}`413` Restore bus and layers to the layer control in the interactive map plot. This was broken in version
   0.13.0.
+- {gh-pr}`404` Fix filtering catalogues using compiled regular expressions with newer versions of pandas.
 
 ## Version 0.13.1
 

roseau/load_flow/utils/mixins.py

@@ -305,7 +305,7 @@ def _filter_catalogue_str(
         """
         vector = pd.Series(strings)
         if isinstance(value, re.Pattern):
-            result = vector.str.fullmatch(value, case=False)
+            result = vector.str.fullmatch(value.pattern, case=False, flags=value.flags)
         else:
             try:
                 result = vector.str.fullmatch(value, case=False) | (vector.str.casefold() == value.casefold())