Update flake8 to 3.9.2

[pyup-bot]

This PR updates flake8 from 3.8.4 to 3.9.2.

Changelog

3.9.2

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

You can view the `3.9.2 milestone`_ on GitHub for more details.

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

- Fix error message for ``E111`` in ``pycodestyle`` (See also :pull:`1328`,
:issue:`1327`).

Deprecations
~~~~~~~~~~~~

- ``indent_size_str`` is deprecated, use ``str(indent_size)`` instead (See
also :pull:`1328`, :issue:`1327`).


.. all links
.. _3.9.2 milestone:
 https://github.com/PyCQA/flake8/milestone/40

3.9.1

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

You can view the `3.9.1 milestone`_ on GitHub for more details.

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

- Fix codes being ignored by plugins utilizing ``extend_default_ignore`` (See
also :pull:`1317`)


.. all links
.. _3.9.1 milestone:
 https://github.com/PyCQA/flake8/milestone/38

3.9.0

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

You can view the `3.9.0 milestone`_ on GitHub for more details.

New Dependency Information
~~~~~~~~~~~~~~~~~~~~~~~~~~

- Pyflakes has been updated to >= 2.3.0, < 2.4.0 (See also :issue:`1006`)

- pycodestyle has been updated to >= 2.7.0, < 2.8.0 (See also :issue:`1007`)

Deprecations
~~~~~~~~~~~~

- Drop support for python 3.4 (See also :issue:`1283`)

Features
~~~~~~~~

- Add ``--no-show-source`` option to disable ``--show-source`` (See also
:issue:`995`)

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

- Fix handling of ``crlf`` line endings when linting stdin (See also
:issue:`1002`)


.. all links
.. _3.9.0 milestone:
 https://github.com/pycqa/flake8/milestone/37

Links

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

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@b80bb2f). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #106   +/-   ##
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  Coverage          ?   96.12%           
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  Files             ?       12           
  Lines             ?      129           
  Branches          ?        0           
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  Hits              ?      124           
  Misses            ?        5           
  Partials          ?        0           

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[pyup-bot]

Closing this in favor of #124