Bump pycodestyle from 2.7.0 to 2.8.0

Bumps [pycodestyle](https://github.com/PyCQA/pycodestyle) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/PyCQA/pycodestyle/releases)
- [Changelog](https://github.com/PyCQA/pycodestyle/blob/main/CHANGES.txt)
- [Commits](https://github.com/PyCQA/pycodestyle/compare/2.7.0...2.8.0)

---
updated-dependencies:
- dependency-name: pycodestyle
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

requirements-dev.txt

@@ -1,7 +1,7 @@
 mock==4.0.3
 nose2[coverage_plugin]==0.10.0
 cov-core==1.15.0
-pycodestyle==2.7.0
+pycodestyle==2.8.0
 pylint==2.11.1
 splinter==0.15.0
 selenium==3.141.0