Merge Request created_after not valid.

[piegus]

[Wed Oct  4 22:11:47 2017] PHP Fatal error:  Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Type error: Argument 1 passed to Gitlab\Api\MergeRequests::Gitlab\Api\{closure}() must implement interface DateTimeInterface, instance of Symfony\Component\OptionsResolver\OptionsResolver given, called in project/vendor/symfony/symfony/src/Symfony/Component/OptionsResolver/OptionsResolver.php on line 885 in project/vendor/m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/MergeRequests.php:39
Stack trace:
#0 project/vendor/symfony/symfony/src/Symfony/Component/OptionsResolver/OptionsResolver.php(885): Gitlab\Api\MergeRequests->Gitlab\Api\{closure}(Object(Symfony\Component\OptionsResolver\OptionsResolver), Object(DateTime))
#1 project/vendor/symfony/symfony/src/Symfony/Component/OptionsResolver/OptionsResolver.php(716): Symfony\Component\OptionsResolver\OptionsResolver->offsetGet('created_a in project/vendor/m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/MergeRequests.php on line 39

Apparenty setNOrmalizer i MegreRequest is throwing flatal error With Option Resolver.
Changing from:

$datetimeNormalizer = function (\DateTimeInterface $value) { return $value->format('c'); };
to:
$datetimeNormalizer = function (Options $options, $value) { return $value->format('c'); }; seems to fix the issue.

https://symfony.com/doc/current/components/options_resolver.html#option-normalization
Im using symfony3.3