Bump pycodestyle from 2.6.0 to 2.7.0

Bumps [pycodestyle](https://github.com/PyCQA/pycodestyle) from 2.6.0 to 2.7.0.
- [Release notes](https://github.com/PyCQA/pycodestyle/releases)
- [Changelog](https://github.com/PyCQA/pycodestyle/blob/master/CHANGES.txt)
- [Commits](https://github.com/PyCQA/pycodestyle/commits)

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

requirements.txt

@@ -16,7 +16,7 @@ mccabe==0.6.1
 mypy-extensions==0.4.3
 numpy==1.20.1
 pathspec==0.8.1
-pycodestyle==2.6.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+pycodestyle==2.7.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 pyflakes==2.2.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 regex==2020.11.13
 toml==0.10.2; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2'