Update flake8 to 3.7.5

[pyup-bot]

This PR updates flake8 from 3.7.2 to 3.7.5.

Changelog

3.7.5

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

You can view the `3.7.5 milestone`_ on GitLab for more details.

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

- Fix reporting of pyflakes "referenced before assignment" error (See also
`GitLab!301`_, `GitLab503`_)


.. all links
.. _3.7.5 milestone:
 https://gitlab.com/pycqa/flake8/milestones/28

.. issue links
.. _GitLab503:
 https://gitlab.com/pycqa/flake8/issues/503

.. merge request links
.. _GitLab!301:
 https://gitlab.com/pycqa/flake8/merge_requests/301

3.7.4

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

You can view the `3.7.4 milestone`_ on GitLab for more details.

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

- Fix performance regression with lots of ``per-file-ignores`` and errors
(See also `GitLab!299`_, `GitLab501`_)


.. all links
.. _3.7.4 milestone:
 https://gitlab.com/pycqa/flake8/milestones/27

.. issue links
.. _GitLab501:
 https://gitlab.com/pycqa/flake8/issues/501

.. merge request links
.. _GitLab!299:
 https://gitlab.com/pycqa/flake8/merge_requests/299

3.7.3

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

You can view the `3.7.3 milestone`_ on GitLab for more details.

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

- Fix imports of ``typing`` in python 3.5.0 / 3.5.1 (See also `GitLab!294`_,
`GitLab498`_)

- Fix ``flake8 --statistics`` (See also `GitLab!295`_, `GitLab499`_)

- Gracefully ignore ``flake8-per-file-ignores`` plugin if installed (See also
`GitLab!297`_, `GitLab495`_)

- Improve error message for malformed ``per-file-ignores`` (See also
`GitLab!298`_, `GitLab489`_)


.. all links
.. _3.7.3 milestone:
 https://gitlab.com/pycqa/flake8/milestones/26

.. issue links
.. _GitLab489:
 https://gitlab.com/pycqa/flake8/issues/489
.. _GitLab495:
 https://gitlab.com/pycqa/flake8/issues/495
.. _GitLab498:
 https://gitlab.com/pycqa/flake8/issues/498
.. _GitLab499:
 https://gitlab.com/pycqa/flake8/issues/499

.. merge request links
.. _GitLab!294:
 https://gitlab.com/pycqa/flake8/merge_requests/294
.. _GitLab!295:
 https://gitlab.com/pycqa/flake8/merge_requests/295
.. _GitLab!297:
 https://gitlab.com/pycqa/flake8/merge_requests/297
.. _GitLab!298:
 https://gitlab.com/pycqa/flake8/merge_requests/298

Links

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

[coveralls]

Pull Request Test Coverage Report for Build 269

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.674%

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Totals
Change from base Build 258:	0.0%
Covered Lines:	126
Relevant Lines:	129

---

💛 - Coveralls

[pyup-bot]

Closing this in favor of #62