composer(deps-dev): bump phpunit/phpunit from 8.5.26 to 8.5.28

[dependabot[bot]]

Bumps phpunit/phpunit from 8.5.26 to 8.5.28.

Changelog

Sourced from phpunit/phpunit's changelog.

[8.5.28] - 2022-07-29

Fixed

• #5015: Ukraine banner unreadable on black background
• #5016: PHPUnit 8.5.27 does not work on PHP 7.2.0-7.2.18 and PHP 7.3.0-7.3.5

[8.5.27] - 2022-06-19

Fixed

• #4950: False error on atMost() invocation rule without call
• #4962: Ukraine banner unreadable on white background

Commits

• 8f2d1c9 Prepare release
• 59da20d Update ChangeLog
• 78493ab Do not pass null to ReflectionClass::getMethods()
• 9edbd2e Update tools
• 3aacfdf Update tools
• 43344fc Fix CS/WS issues
• 3feccbd Update tools
• dbbca19 Update ChangeLog
• 48db8b2 Update tests.
• 232327b Update StandWithUkraine message color.
• Additional commits viewable in compare view

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