Bump pydocstyle from 6.0.0 to 6.1.1

Bumps [pydocstyle](https://github.com/PyCQA/pydocstyle) from 6.0.0 to 6.1.1.
- [Release notes](https://github.com/PyCQA/pydocstyle/releases)
- [Changelog](https://github.com/PyCQA/pydocstyle/blob/master/docs/release_notes.rst)
- [Commits](PyCQA/pydocstyle@6.0.0...6.1.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

lint-requirements.txt

@@ -3,4 +3,4 @@ black==21.5b1
 flake8==3.9.2
 isort==5.8.0
 msgcheck==3.1
-pydocstyle==6.0.0
+pydocstyle==6.1.1