Symfony 2.3 not supported?

[mes-nta]

The services.yml for this bundle utilizes @request_stack, but this feature was not added until Symfony 2.4; attempting to utilize the current version of this package on Symfony 2.3 throws an error due to this dependency:

[Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]
The service "vihuvac_recaptcha.form.type" has a dependency on a non-existent service "request_stack".

For symfony 2.3, this should be "request", not "request_stack"