Bump pytest-deadfixtures from 2.2.0 to 2.2.1

Bumps [pytest-deadfixtures](https://github.com/jllorencetti/pytest-deadfixtures) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/jllorencetti/pytest-deadfixtures/releases)
- [Changelog](https://github.com/jllorencetti/pytest-deadfixtures/blob/master/CHANGES.rst)
- [Commits](jllorencetti/pytest-deadfixtures@2.2.0...2.2.1)

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