Bump pycodestyle from 2.5.0 to 2.6.0

Bumps [pycodestyle](https://github.com/PyCQA/pycodestyle) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/PyCQA/pycodestyle/releases)
- [Changelog](https://github.com/PyCQA/pycodestyle/blob/master/CHANGES.txt)
- [Commits](PyCQA/pycodestyle@2.5.0...2.6.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -6,7 +6,7 @@ parso==0.7.0
 pipdeptree==0.13.2
 pluggy==0.13.1
 py==1.8.2
-pycodestyle==2.5.0
+pycodestyle==2.6.0
 pyparsing==2.4.7
 PySide2==5.14.2
 pytest==5.4.3