Bump flake8-pytest-style from 1.2.0 to 1.2.1 (#79)

Bumps [flake8-pytest-style](https://github.com/m-burst/flake8-pytest-style) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/m-burst/flake8-pytest-style/releases)
- [Commits](m-burst/flake8-pytest-style@v1.2.0...v1.2.1)

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