Update flake8 to 3.8.2

[pyup-bot]

This PR updates flake8 from 3.8.1 to 3.8.2.

Changelog

3.8.2

-------------------

You can view the `3.8.2 milestone`_ on GitLab for more details.

Bugs Fixed
~~~~~~~~~~

- Improve performance by eliminating unncessary sort (See also `GitLab!429`_)

- Improve messaging of ``--jobs`` argument by utilizing ``argparse`` (See also
`GitLab!428`_, `GitLab567`_)

- Fix file configuration options to be relative to the config passed on the
command line (See also `GitLab!431`_, `GitLab651`_)

- Fix incorrect handling of ``--extend-exclude`` by treating its values as
files (See also `GitLab!432`_, `GitLab653`_)

.. all links
.. _3.8.2 milestone:
 https://gitlab.com/pycqa/flake8/-/milestones/35

.. issue links
.. _GitLab567:
 https://gitlab.com/pycqa/flake8/issues/567
.. _GitLab651:
 https://gitlab.com/pycqa/flake8/issues/651
.. _GitLab653:
 https://gitlab.com/pycqa/flake8/issues/653

.. merge request links
.. _GitLab!428:
 https://gitlab.com/pycqa/flake8/merge_requests/428
.. _GitLab!429:
 https://gitlab.com/pycqa/flake8/merge_requests/429
.. _GitLab!431:
 https://gitlab.com/pycqa/flake8/merge_requests/431
.. _GitLab!432:
 https://gitlab.com/pycqa/flake8/merge_requests/432

Links

• PyPI: https://pypi.org/project/flake8
• Changelog: https://pyup.io/changelogs/flake8/
• Repo: https://gitlab.com/pycqa/flake8