Update python-dfwinreg to version 0~20211207 / rev 7 via SR 981356
    
    https://build.opensuse.org/request/show/981356
    by user gregfreemyer + dimstar_suse
    Superseed yesterday's SR.  It totally failed in Tumbleweed testing.
    
    -update %check section to use python macros
    -change %python3_build to %python_build
        --  formerly no *.py files were being included in the RPM packages for Tumbleweed
    - update to 20211207
      - added support for some malformed registry entry values
    - add %define skip_python2 1
    - enable %check and add new BuildRequires dependencies as needed to support ./run_tests.py
    - update to 20201006
      - Changes for REG_MULTI_SZ support
      - Changes to improve handling HKEY_USERS
      - Changes for test paths to be independent of working directory
      - Changes to formattingstrings for type()
      - Removed python2 support
      - Added Windows 9x/Me Registry support
    - added:
      Requires:       python3-libcreg
      Requires:       python3-libregf >