Increase version of symfony components for PHP 8

[joachim-n]

Deprecated: Return type of Symfony\Component\Console\Helper\HelperSet::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /Users/joachim/Sites/_sandbox/dorgflow/vendor/symfony/console/Helper/HelperSet.php on line 111