allow phpunit 11 in composer json

[gam6itko]

No description provided.

[roxblnfk]

I'm not sure that will work because there the runTest() method is final:
https://github.com/sebastianbergmann/phpunit/blob/9b98888a90c39dc922f01e6d3a34bc077bac3460/src/Framework/TestCase.php#L1095

But we extend it in our test case:

testing/src/TestCase.php

Line 231 in 767e903

protected function runTest(): mixed

Until PHPUnit becomes extensible or interceptors are added, we likely won't be able to upgrade to version 11. If you know how we can intercept test execution in another way, please let us know.

BTW, related issue: sebastianbergmann/phpunit#5254