build(deps-dev): bump pylint from 2.8.2 to 2.9.6

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.8.2 to 2.9.6.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/main/ChangeLog)
- [Commits](pylint-dev/pylint@v2.8.2...v2.9.6)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,11 +1,11 @@
 coverage == 5.5
 freezegun == 1.1.0
 mypy == 0.910
-pylint == 2.8.2
+pylint == 2.9.6
 pytest == 6.2.4
 pytest-asyncio == 0.15.1
-pytest-cov == 2.11.1
+pytest-cov == 2.12.1
 pytest-random-order == 1.0.4
-responses == 0.13.3
+responses == 0.13.4
 sqlalchemy-stubs == 0.4
 -r requirements.txt