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>

authentik/policies/engine.py

@@ -62,12 +62,6 @@ class PolicyEngine:
     # Allow objects with no policies attached to pass
     empty_result: bool
 
-    __pbm: PolicyBindingModel
-    __cached_policies: list[PolicyResult]
-    __processes: list[PolicyProcessInfo]
-
-    __expected_result_count: int
-
     def __init__(
         self, pbm: PolicyBindingModel, user: User, request: HttpRequest = None
     ):
@@ -83,8 +77,8 @@ class PolicyEngine:
         self.request.obj = pbm
         if request:
             self.request.set_http_request(request)
-        self.__cached_policies = []
-        self.__processes = []
+        self.__cached_policies: list[PolicyResult] = []
+        self.__processes: list[PolicyProcessInfo] = []
         self.use_cache = True
         self.__expected_result_count = 0