chore(deps): update dependency phpunit/phpunit to v9.5.16

This MR contains the following updates:

Package	Type	Update	Change
phpunit/phpunit (source)	require-dev	patch	9.5.14 -> 9.5.16

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Release Notes

sebastianbergmann/phpunit

v9.5.16

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This MR has been generated by Renovate Bot.

added renovate label

enabled an automatic merge when the pipeline for 43212c19 succeeds

By Reiter, Christoph on 2022-02-27T01:16:47 (imported from GitLab)

mentioned in issue #5

By Reiter, Christoph on 2022-02-27T01:16:49 (imported from GitLab)

mentioned in commit 5bcbf8fc

By Reiter, Christoph on 2022-02-27T01:18:49 (imported from GitLab)