Bump pep8 from 1.5.7 to 1.7.1

[dependabot-preview]

Bumps pep8 from 1.5.7 to 1.7.1.

Release notes

Sourced from pep8's releases.

1.7.1

This will be the final release of the pep8 package, all future usage should be of the pycodestyle package instead (version 2.x + of this repository).

Changes:

• Prominently note via warning message that the tool is no longer released as
  pep8 and will only be fixed in the pycodestyle package

Changelog

Sourced from pep8's changelog.

1.7.1 (2017-10-22)

Changes:

• Prominently note via warning message that the tool is no longer released as
  pep8 and will only be fixed in the pycodestyle package

1.7.0 (2016-01-12)

Announcements:

• Repository moved to PyCQA Organization on GitHub:
  https://github.com/pycqa/pep8

Changes:

• Reverted the fix in #368, "options passed on command line are only ones
  accepted" feature. This has many unintended consequences in pep8 and flake8
  and needs to be reworked when I have more time.
• Added support for Python 3.5. (Issue #420 & #459)
• Added support for multi-line config_file option parsing. (Issue #429)
• Improved parameter parsing. (Issues #420 & #456)

Bugs:

• Fixed BytesWarning on Python 3. (Issue #459)

1.6.2 (2015-02-15)

Changes:

• Added check for breaking around a binary operator. (Issue #197, Pull #305)

Bugs:

• Restored config_file parameter in process_options(). (Issue #380)

1.6.1 (2015-02-08)

Changes:

• Assign variables before referenced. (Issue #287)

Bugs:

... (truncated)

Commits

• 45f79c7 Release 1.7.1
• 0b5a432 Add links to old and new package names
• 05ec89f Updated the doc index with not about new name
• d4a6003 Removed pycodestyle entry point
• 24d3ca6 Updated version number to 1.7.1.dev0
• b6cef17 Added pycodestyle entrypoint
• 504d8dc Backported maintainer update in setup.py
• b8088a2 Merge pull request #470 from PyCQA/release/v1.7
• a0da509 Changed to make new release 1.7 rather than 1.6.3
• dd2302e Added missing changelog entries.
• Additional commits viewable in compare view

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