Symfony version affected: 4.2

Description
Can't use PHPUnit 8.0, because this error appears

"PHP Fatal error: Class Symfony\Bridge\PhpUnit\Legacy\TestRunnerForV7 may not inherit from final class (PHPUnit\TextUI\TestRunner) in /home/NIX/kruhliak/Projects/second/vendor/symfony/phpunit-bridge/Legacy/TestRunnerForV7.php on line 22"