chore(deps): update dependency phpunit/phpunit to v9.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
phpunit/phpunit (source)	require-dev	patch	9.1.0 -> 9.1.1

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Release Notes

sebastianbergmann/phpunit

### [`v9.1.1`](https://togithub.com/sebastianbergmann/phpunit/compare/9.1.0...9.1.1) [Compare Source](https://togithub.com/sebastianbergmann/phpunit/compare/9.1.0...9.1.1)

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