Bump pydocstyle from 5.1.1 to 6.3.0 (#57)

Bumps [pydocstyle](https://github.com/PyCQA/pydocstyle) from 5.1.1 to 6.3.0.
- [Release notes](https://github.com/PyCQA/pydocstyle/releases)
- [Changelog](https://github.com/PyCQA/pydocstyle/blob/master/docs/release_notes.rst)
- [Commits](PyCQA/pydocstyle@5.1.1...6.3.0)

---
updated-dependencies:
- dependency-name: pydocstyle
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -13,6 +13,6 @@ pyupgrade==2.7.2
 black==20.8b1
 flake8==3.8.3
 # flake8-docstrings==1.5.0
-pydocstyle==5.1.1
+pydocstyle==6.3.0
 bandit==1.6.2
 isort==5.13.2