Merge pull request #349 from CSCfi/dependabot/pip/flake8-6.0.0

Bump flake8 from 5.0.4 to 6.0.0

Author: github-actions[bot]

setup.py

@@ -60,7 +60,7 @@
             "pytest-cov==4.0.0",
             "testfixtures==7.0.3",
             "tox==3.27.1",
-            "flake8==5.0.4",
+            "flake8==6.0.0",
             "flake8-docstrings==1.6.0",
             "aioresponses==0.7.3",
             "black==22.10.0",