build(deps-dev): bump pylint from 2.8.3 to 2.9.0 (#1095)

* build(deps-dev): bump pylint from 2.8.3 to 2.9.0

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.8.3 to 2.9.0.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](https://github.com/PyCQA/pylint/compare/v2.8.3...v2.9.0)

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

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

* *: update source for new pylint version

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jens Langhammer <jens.langhammer@beryju.org>

tests/integration/test_outpost_docker.py

@@ -62,11 +62,14 @@ class OutpostDockerTests(TestCase):
         )
         authentication_kp = CertificateKeyPair.objects.create(
             name="docker-authentication",
+            # pylint: disable=consider-using-with
             certificate_data=open(f"{self.ssl_folder}/client/cert.pem").read(),
+            # pylint: disable=consider-using-with
             key_data=open(f"{self.ssl_folder}/client/key.pem").read(),
         )
         verification_kp = CertificateKeyPair.objects.create(
             name="docker-verification",
+            # pylint: disable=consider-using-with
             certificate_data=open(f"{self.ssl_folder}/client/ca.pem").read(),
         )
         self.service_connection = DockerServiceConnection.objects.create(