Make sure we do not bind to specific twig version before the TwigVisi…

[Nyholm]

…torFactory has been executed

To fix the error on SF twig1:

Fatal error: Declaration of Translation\Extractor\Visitor\Twig\Twig2Visitor::enterNode(Twig_Node $node, Twig_Environment $env) must be compatible with Twig_NodeVisitorInterface::enterNode(Twig_NodeInterface $node, Twig_Environment $env) in local/path/vendor/php-translation/extractor/src/Visitor/Twig/Twig2Visitor.php on line 20