Log Message:
py-requests-kerberos: updated to 0.14.0

0.14.0: 2021-12-05
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- Added support for proxy authentication with ``HTTP`` endpoints.
- Support for proxying ``HTTPS`` endpoints is not available due to limitations
  of the underlying requests/urllib3 library.
- Fixed up stray bytes to str conversion.

0.13.0: 2021-11-03
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- Change Kerberos dependencies to pyspnego_ to modernise the underlying
  Kerberos library that is used.
- Removed the ``wrap_winrm`` and ``unwrap_winrm`` functions
- Dropped support for Python 2 and raised minimum Python version to 3.6.
- Renamed the ``context`` attribute to ``_context`` to indicate it's meant for
  internal use only.
- Fix Negotiate header regex pattern to avoid DoS affected patterns