python-six was updated to 1.11.0.

Changes:

- `with_metaclass` now properly proxies `__prepare__` to the underlying metaclass.
- Allow `with_metaclass` to work with metaclasses implemented in C.
- Add parse_http_list and parse_keqv_list to moved urllib.request.
- Add unquote_to_bytes to moved urllib.parse.
- Add `six.moves.getoutput`.
- Add `six.moves.urllib_parse.splitvalue`.
- Add `six.moves.email_mime_image`.
- Avoid creating reference cycles through tracebacks in `reraise`.
- Improve the performance of `six.int2byte` on Python 3.
- Don't add the `winreg` module to `six.moves` on non-Windows platforms.
- Add `six.moves.getcwd` and `six.moves.getcwdu`.
- Add `create_unbound_method` to create unbound methods.

This update was imported from the SUSE:SLE-12:Update update project.