composer(deps-dev): update phpunit/phpunit requirement from ^9.5 to ^9.6

[dependabot[bot]]

Updates the requirements on phpunit/phpunit to permit the latest version.

Changelog

Sourced from phpunit/phpunit's changelog.

9.6.0 - 2023-02-03

Changed

• #5062: Deprecate expectDeprecation(), expectDeprecationMessage(), expectDeprecationMessageMatches(), expectError(), expectErrorMessage(), expectErrorMessageMatches(), expectNotice(), expectNoticeMessage(), expectNoticeMessageMatches(), expectWarning(), expectWarningMessage(), and expectWarningMessageMatches()
• #5063: Deprecate withConsecutive()
• #5064: Deprecate PHPUnit\Framework\TestCase::getMockClass()
• #5132: Deprecate Test suffix for abstract test case classes

Commits

• 70fc8be Prepare release
• 2b3bfef Merge branch '9.5' into 9.6
• a3549f1 Add test for #5074
• 2aa65e1 Do not rely on globally installed Phive
• df0f454 Do not rely on globally installed Phive
• e13cc26 Merge branch '9.5' into 9.6
• f2cc098 Merge branch '8.5' into 9.5
• e10885d Tweak
• 1247403 Merge branch '9.5' into 9.6
• 104a1ce Merge branch '8.5' into 9.5
• Additional commits viewable in compare view

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