Bump pylint from 2.11.1 to 2.12.1

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.11.1 to 2.12.1.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/main/ChangeLog)
- [Commits](pylint-dev/pylint@v2.11.1...v2.12.1)

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

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

pyproject.toml

@@ -51,7 +51,7 @@ django-extensions = "^3.1.5"
 coverage = "^6.1"
 coveralls = "^3.3.1"
 isort = "^5.10.1"
-pylint = "^2.11.1"
+pylint = "^2.12.1"
 autoflake = "^1.4"
 Sphinx = "^3.5.4"
 sphinx-rtd-theme = "^1.0.0"