v0.87.0

• Resolved circular dependency issue in XDGPathname join and + methods
  that caused infinite recursion.
• Updated -F flag behavior in bin/search to follow symlinks when the flag
  is enabled, aligning with its documentation.
• Corrected typo in help text for the -L option in bin/discover.
• Fixed Liskov Substitution Principle violation in Pathname subclassing for
  XDGPathname by overriding key methods (join, +, dirname, basename,
  realpath, expand_path, cleanpath, relative_path_from) to ensure
  consistent return types.