Bump pycodestyle from 2.5.0 to 2.6.0 (#15)

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](https://github.com/PyCQA/pycodestyle/compare/2.5.0...2.6.0)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

requirements.txt

@@ -26,7 +26,7 @@ pluggy==0.13.1
 psutil==5.7.0
 py==1.8.1
 py-cpuinfo==6.0.0
-pycodestyle==2.5.0
+pycodestyle==2.6.0
 pyflakes==2.2.0
 pylint==2.4.4
 pyparsing==2.4.7