[pre-commit.ci] pre-commit autoupdate (chrisjsewell#29)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -21,8 +21,8 @@ repos:
  hooks:
  - id: black
 
- - repo: https://gitlab.com/pycqa/flake8
- rev: 3.9.2
+ - repo: https://github.com/PyCQA/flake8
+ rev: 4.0.1
  hooks:
  - id: flake8
  additional_dependencies: