Update flake8 to 3.8.4

[pyup-bot]

This PR updates flake8 from 3.7.9 to 3.8.4.

Changelog

3.8.4

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

You can view the `3.8.4 milestone`_ on GitLab for more details.

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

- Fix multiprocessing errors on platforms without ``sem_open`` syscall.  (See
also `GitLab!448`_)

- Fix skipping of physical checks on the last line of a file which does not
end in a newline (See also `GitLab!451`_)

.. all links
.. _3.8.4 milestone:
 https://gitlab.com/pycqa/flake8/-/milestones/37

.. merge request links
.. _GitLab!448:
 https://gitlab.com/pycqa/flake8/merge_requests/448
.. _GitLab!451:
 https://gitlab.com/pycqa/flake8/merge_requests/451

3.8.3

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

You can view the `3.8.3 milestone`_ on GitLab for more details.

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

- Also catch ``SyntaxError`` when tokenizing (See also `GitLab!433`_,
`GitLab662`_)

- Fix ``--jobs`` default display in ``flake8 --help`` (See also `GitLab!434`_,
`GitLab665`_)

.. all links
.. _3.8.3 milestone:
 https://gitlab.com/pycqa/flake8/-/milestones/36

.. issue links
.. _GitLab662:
 https://gitlab.com/pycqa/flake8/issues/662
.. _GitLab665:
 https://gitlab.com/pycqa/flake8/issues/665

.. merge request links
.. _GitLab!433:
 https://gitlab.com/pycqa/flake8/merge_requests/433
.. _GitLab!434:
 https://gitlab.com/pycqa/flake8/merge_requests/434

3.8.2

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

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

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

- Improve performance by eliminating unnecessary 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

3.8.1

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

You can view the `3.8.1 milestone`_ on GitLab for more details.

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

- Fix ``--output-file`` (regression in 3.8.0) (See also `GitLab!427`_,
`GitLab637`_)


.. all links
.. _3.8.1 milestone:
 https://gitlab.com/pycqa/flake8/-/milestones/34

.. issue links
.. _GitLab637:
 https://gitlab.com/pycqa/flake8/issues/637

.. merge request links
.. _GitLab!427:
 https://gitlab.com/pycqa/flake8/merge_requests/427

3.8.0

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

You can view the `3.8.0 milestone`_ on GitLab for more details.

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

- Fix logical checks which report positions out of bounds (See also
`GitLab!422`_, `GitLab635`_)

- Fix ``--exclude=.*`` accidentally matching ``.`` and ``..`` (See also
`GitLab!424`_, `GitLab632`_)

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

- Add deprecation message for vcs hooks (See also `GitLab!420`_,
`GitLab568`_)

3.8.0a2

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

You can view the `3.8.0 milestone`_ on GitLab for more details.

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

- Fix ``type="str"`` optparse options (See also `GitLab!419`_)

3.8.0a1

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

You can view the `3.8.0 milestone`_ on GitLab for more details.

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

- Remove dependency on ``entrypoints`` and add dependency on
``importlib-metadata`` (only for ``python<3.8``) (See also `GitLab!388`_,
`GitLab569`_)

- Pyflakes has been updated to >= 2.2.0, < 2.3.0 (See also `GitLab!417`_)

- pycodestyle has been updated to >= 2.6.0a1, < 2.7.0 (See also `GitLab!418`_)

Features
~~~~~~~~

- Add ``--extend-exclude`` option to add to ``--exclude`` without overwriting
(See also `GitLab!315`_, `GitLab535`_)

- Move argument parsing from ``optparse`` to ``argparse`` (See also
`GitLab!341`_

- Group plugin options in ``--help`` (See also `GitLab!342`_, `GitLab565`_)

- Remove parsing of ``verbose`` from configuration files as it was not
consistently applied (See also `GitLab!360`_, `GitLab439`_)

- Remove parsing of ``output_file`` from configuration files as it was not
consistently applied (See also `GitLab!361`_)

- Resolve configuration files relative to ``cwd`` instead of common prefix of
passed filenames.  You may need to change ``flake8 subproject`` to
``cd subproject && flake8 .`` (See also `GitLab!363`_)

- Officially support python3.8 (See also `GitLab!377`_)

- ``--disable-noqa`` now also disables `` flake8: noqa`` (See also
`GitLab!380`_, `GitLab590`_)

- Ensure that a missing file produces a ``E902`` error (See also `GitLab!404`_,
`GitLab600`_)

- `` noqa`` comments now apply to all of the lines in an explicit ``\``
continuation or in a line continued by a multi-line string (See also
`GitLab!413`_, `GitLab375`_)

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

- Fix ``--exclude=./t.py`` to only match ``t.py`` at the top level (See also
`GitLab!311`_, `GitLab382`_)

- Fix ``--show-source`` when a file is indented with tabs (See also
`GitLab!339`_, `GitLab563`_)

- Fix crash when ``--max-line-length`` is given a non-integer (See also
`GitLab!341`_, `GitLab541`_)

- Prevent flip-flopping of ``indent_char`` causing extra ``E101`` errors (See
also `GitLab!357`_, `pycodestyle886`_)

- Only enable multiprocessing when the method is ``fork`` fixing issues
on macos with python3.8+ (See also `GitLab!366`_, `GitLab587`_) (note: this
fix also landed in 3.7.9)

- ``noqa`` is now only handled by flake8 fixing specific-noqa.  Plugins
requesting this parameter will always receive ``False`` (See also
`GitLab!331`_, `GitLab552`_)

- Fix duplicate loading of plugins when invoked via ``python -m flake8`` (See
also `GitLab!388`_)

- Fix early exit when ``--exit-zero`` and ``--diff`` are provided and the diff
is empty (See also `GitLab!391`_)

- Consistently split lines when ``\f`` is present when reading from stdin (See
also `GitLab!406`_, `GitLab270`_)

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

- ``python setup.py flake8`` (setuptools integration) is now deprecated and
will be removed in a future version (See also `GitLab!330`_, `GitLab544`_)

- ``type='string'`` (optparse) types are deprecated, use
``type=callable`` (argparse) instead.  Support for ``type='string'`` will
be removed in a future version (See also `GitLab!341`_)

- ``%default`` in plugin option help text is deprecated, use ``%(default)s``
instead.  Support for ``%default`` will be removed in a future version (See
also `GitLab!341`_)

- optparse-style ``action='callback'`` setting for options is deprecated, use
argparse action classes instead.  This will be removed in a future version
(See also `GitLab!341`_)


.. all links
.. _3.8.0 milestone:
 https://gitlab.com/pycqa/flake8/-/milestones/32

.. merge request links
.. _GitLab270:
https://gitlab.com/pycqa/flake8/-/issues/270
.. _GitLab375:
https://gitlab.com/pycqa/flake8/-/issues/375
.. _GitLab382:
https://gitlab.com/pycqa/flake8/-/issues/382
.. _GitLab439:
https://gitlab.com/pycqa/flake8/-/issues/439
.. _GitLab535:
https://gitlab.com/pycqa/flake8/-/issues/535
.. _GitLab541:
https://gitlab.com/pycqa/flake8/-/issues/541
.. _GitLab544:
https://gitlab.com/pycqa/flake8/-/issues/544
.. _GitLab552:
https://gitlab.com/pycqa/flake8/-/issues/552
.. _GitLab563:
https://gitlab.com/pycqa/flake8/-/issues/563
.. _GitLab565:
https://gitlab.com/pycqa/flake8/-/issues/565
.. _GitLab568:
https://gitlab.com/pycqa/flake8/-/issues/568
.. _GitLab569:
https://gitlab.com/pycqa/flake8/-/issues/569
.. _GitLab587:
https://gitlab.com/pycqa/flake8/-/issues/587
.. _GitLab590:
https://gitlab.com/pycqa/flake8/-/issues/590
.. _GitLab600:
https://gitlab.com/pycqa/flake8/-/issues/600
.. _GitLab632:
https://gitlab.com/pycqa/flake8/-/issues/632
.. _GitLab635:
https://gitlab.com/pycqa/flake8/-/issues/635
.. _pycodestyle886:
https://github.com/PyCQA/pycodestyle/issues/886

.. issue links
.. _GitLab!311:
https://gitlab.com/pycqa/flake8/-/merge_requests/311
.. _GitLab!315:
https://gitlab.com/pycqa/flake8/-/merge_requests/315
.. _GitLab!330:
https://gitlab.com/pycqa/flake8/-/merge_requests/330
.. _GitLab!331:
https://gitlab.com/pycqa/flake8/-/merge_requests/331
.. _GitLab!339:
https://gitlab.com/pycqa/flake8/-/merge_requests/339
.. _GitLab!341:
https://gitlab.com/pycqa/flake8/-/merge_requests/341
.. _GitLab!342:
https://gitlab.com/pycqa/flake8/-/merge_requests/342
.. _GitLab!357:
https://gitlab.com/pycqa/flake8/-/merge_requests/357
.. _GitLab!360:
https://gitlab.com/pycqa/flake8/-/merge_requests/360
.. _GitLab!361:
https://gitlab.com/pycqa/flake8/-/merge_requests/361
.. _GitLab!363:
https://gitlab.com/pycqa/flake8/-/merge_requests/363
.. _GitLab!366:
https://gitlab.com/pycqa/flake8/-/merge_requests/366
.. _GitLab!377:
https://gitlab.com/pycqa/flake8/-/merge_requests/377
.. _GitLab!380:
https://gitlab.com/pycqa/flake8/-/merge_requests/380
.. _GitLab!388:
https://gitlab.com/pycqa/flake8/-/merge_requests/388
.. _GitLab!391:
https://gitlab.com/pycqa/flake8/-/merge_requests/391
.. _GitLab!404:
https://gitlab.com/pycqa/flake8/-/merge_requests/404
.. _GitLab!406:
https://gitlab.com/pycqa/flake8/-/merge_requests/406
.. _GitLab!413:
https://gitlab.com/pycqa/flake8/-/merge_requests/413
.. _GitLab!417:
https://gitlab.com/pycqa/flake8/-/merge_requests/417
.. _GitLab!418:
https://gitlab.com/pycqa/flake8/-/merge_requests/418
.. _GitLab!419:
https://gitlab.com/pycqa/flake8/-/merge_requests/419
.. _GitLab!420:
https://gitlab.com/pycqa/flake8/-/merge_requests/420
.. _GitLab!422:
https://gitlab.com/pycqa/flake8/-/merge_requests/422
.. _GitLab!424:
https://gitlab.com/pycqa/flake8/-/merge_requests/424

Links

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