Update dependency phpunit/phpunit to v8.5.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
phpunit/phpunit (source)	require-dev	patch	8.5.1 -> 8.5.2

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Release Notes

sebastianbergmann/phpunit

### [`v8.5.2`](https://togithub.com/sebastianbergmann/phpunit/compare/8.5.1...8.5.2) [Compare Source](https://togithub.com/sebastianbergmann/phpunit/compare/8.5.1...8.5.2)

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