PHPUnit 10 Support

[luchaninov]

PHPUnit 10 was released 5 days ago
https://github.com/sebastianbergmann/phpunit/releases/tag/10.0.0

It's not possible to upgrade because of dependency in composer.json "require": { ... "phpunit/phpunit":"^9.1" ... }
https://github.com/phpspec/prophecy-phpunit/blob/master/composer.json#L19

[jdreesen]

#45