Bump pylint from 2.8.2 to 2.15.7

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.8.2 to 2.15.7.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Commits](pylint-dev/pylint@v2.8.2...v2.15.7)

---
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]

Pipfile

@@ -12,6 +12,6 @@ requests-iap = "==0.2.0"
 python-keycloak-client = "==0.2.3"
 
 [dev-packages]
-pylint = "==2.8.2"
+pylint = "==2.15.7"
 tox = "==3.27.0"
 tox-pipenv = "==1.10.1"