Bump pylint from 2.17.2 to 2.17.4

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.17.2 to 2.17.4.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Commits](pylint-dev/pylint@v2.17.2...v2.17.4)

---
updated-dependencies:
- dependency-name: pylint
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/lint.txt

@@ -13,7 +13,7 @@ amqp==5.0.9
     #   -r requirements/functests.txt
     #   -r requirements/tests.txt
     #   kombu
-astroid==2.15.2
+astroid==2.15.5
     # via pylint
 attrs==20.2.0
     # via
@@ -324,7 +324,7 @@ pyjwt==2.6.0
     # via
     #   -r requirements/functests.txt
     #   -r requirements/tests.txt
-pylint==2.17.2
+pylint==2.17.4
     # via -r requirements/lint.in
 pyparsing==3.0.9
     # via