chore(deps): update dependency phpunit/phpunit to v9.6.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
phpunit/phpunit (source)	9.6.11 -> 9.6.21

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Release Notes

sebastianbergmann/phpunit (phpunit/phpunit)

v9.6.21: PHPUnit 9.6.21

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Changed

• #​5956: Deprecation of the E_STRICT constant in PHP 8.4
• Removed .phpstorm.meta.php file as methods such as TestCase::createStub() use generics / template types for their return types and PhpStorm, for example, uses that information

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How to install or update PHPUnit

v9.6.20: PHPUnit 9.6.20

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Changed

• Updated dependencies (so that users that install using Composer's --prefer-lowest CLI option also get recent versions)

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How to install or update PHPUnit

v9.6.19: PHPUnit 9.6.19

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Changed

• The namespaces of dependencies are now prefixed with PHPUnitPHAR instead of just PHPUnit for the PHAR distribution of PHPUnit

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How to install or update PHPUnit

v9.6.18

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v9.6.17

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v9.6.16

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v9.6.15

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v9.6.14

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v9.6.13

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v9.6.12

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.31%. Comparing base (37bdc59) to head (d7b5787).

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #22   +/-   ##
=========================================
  Coverage     80.31%   80.31%           
  Complexity       24       24           
=========================================
  Files             4        4           
  Lines           127      127           
=========================================
  Hits            102      102           
  Misses           25       25           

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