Update python-parsy to version 2.1 / rev 2 via SR 1177642
    
    https://build.opensuse.org/request/show/1177642
    by user mcepl + anag+factory
    - Clean up the SPEC file.
    - Update to 2.1:
      * Dropped support for Python 3.7.
      * Test against Python 3.11.
      * Added docstrings and basic type hints to all primitives and main
        methods.
    - Changes from 2.0:
      * Dropped support for Python < 3.6.
      * Added Parser.until().
      * Parser.optional() now supports an optional default argument to be
        returned instead None.
    - Changes from 1.4:
      * Documentation improvements.
      * Added group parameter to regex().
      * Support bytes with regex() as well as str.
      * Added forward_declaration.
    - Apply spec-cleaner.