Merge pull request #518 from nschloe/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: nschloe

.pre-commit-config.yaml

@@ -11,6 +11,6 @@ repos:
         language_version: python3
 
   - repo: https://github.com/PyCQA/flake8
-    rev: 3.9.2
+    rev: 4.0.1
     hooks:
       - id: flake8