Translated required_if to german (#2012)
Translated required_if to german (#2012)

Ex (Locale):
> This PR adds the german message for required_if, since it is missing.

logaretm/vee-validate,logaretm/vee-validate,logaretm/vee-validate,baianat/vee-validate,baianat/vee-validate,baianat/vee-validate