Fix pyparsing version check

Co-authored-by: Kyle Sunden <[email protected]>

Author: devRD

lib/matplotlib/_mathtext.py

@@ -28,7 +28,7 @@
 from .ft2font import FT2Image, KERNING_DEFAULT
 
 from pyparsing import __version__ as pyparsing_version
-if pyparsing_version < '3.0.0':
+if tuple(int(x) for x in pyparsing_version.split(".")) < (3, 0, 0):
     from pyparsing import nestedExpr as nested_expr
 else:
     from pyparsing import nested_expr