updates: - [github.com/asottile/pyupgrade: v2.21.0 → v2.21.2](https://github.com/asottile/pyupgrade/compare/v2.21.0...v2.21.2) - [github.com/psf/black: 21.6b0 → 21.7b0](https://github.com/psf/black/compare/21.6b0...21.7b0) - https://gitlab.com/pycqa/flake8 → https://github.com/PyCQA/flake8
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