Keep support for PHPUnit 10

[VincentLanglet]

Hi @Slamdunk,

I don't think this PR (https://github.com/paratestphp/paratest/pull/860) require to drop the PHPUnit 10 support ; so i'd like to try working on keeping it. Paratest don't have to support every minor/patch of PHPUnit 10, just last ones. Which means that an issue with failOnPhpunitDeprecation won't exist on both PHPUnit 10 and 11.

Not all project can currently, easily, using PHPUnit 11 for the following reason:

• PHPunit use nikic/php-parser 5 while other tools like PHPStan, Psalm or rector use the php-parser 4
• Symfony ErrorHandler does not work well with PHPUnit (https://github.com/symfony/symfony/issues/53812)
• I personnally have a weird issue with paratest I need to investigate more (https://github.com/paratestphp/paratest/issues/868)
• Certainly more/others.

I think it would be great for such a useful tool as paratest to keep both support of PHPUnit 10 and 11 for some time to help people migrating. I'm ok working on it. Currently I'm having errors locally, but since I have the same with phpunit 11 I dunno how is the state of PHPUnit 10 support with my branch, so I'd like to try on the CI.

Thanks.

[Slamdunk]

PHPUnit 10 has been supported until it was afforable, then https://github.com/paratestphp/paratest/issues/857 came and it wasn't anymore.

When available, the support of two different versions of PHPUnit is merely a fortunate coincidence that as soon as it disappears we can't have it anymore.

[Slamdunk]

Thanks with the support of @arnovbr, a fix has been released in v7.4.6