pre-commit: bump repositories

[pre-commit-ci[bot]]

updates:

• github.com/pre-commit/pre-commit-hooks: v3.1.0 → v4.0.1
• https://github.com/pre-commit/mirrors-isort → https://github.com/PyCQA/isort
• github.com/PyCQA/isort: v5.5.3 → 5.9.3
• https://gitlab.com/pycqa/flake8 → https://github.com/PyCQA/flake8
• github.com/PyCQA/flake8: 3.8.3 → 3.9.2