Update pycodestyle to 2.5.0

[pyup-bot]

This PR updates pycodestyle from 2.4.0 to 2.5.0.

Changelog

2.5.0

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

New checks:

* E117: Over-indented code blocks
* W505: Maximum doc-string length only when configured with --max-doc-length

Changes:

* Remove support for EOL Python 2.6 and 3.3. PR 720.
* Add E117 error for over-indented code blocks.
* Allow W605 to be silenced by ` noqa` and fix the position reported by W605
* Allow users to omit blank lines around one-liner definitions of classes and
functions
* Include the function return annotation (``->``) as requiring surrounding
whitespace only on Python 3
* Verify that only names can follow ``await``. Previously we allowed numbers
and strings.
* Add support for Python 3.7
* Fix detection of annotated argument defaults for E252
* Cprrect the position reported by W504

Links

• PyPI: https://pypi.org/project/pycodestyle
• Changelog: https://pyup.io/changelogs/pycodestyle/
• Docs: https://pycodestyle.readthedocs.io/