create implication grisaia_phantom_trigger -> grisaia_(series)
Phantom Trigger is the latest installment of the Grisaia series, so it should imply the overarching series like the other three Grisaia copyright tags.
EDIT: The tag implication grisaia_phantom_trigger -> grisaia_(series) (forum #149102) has been approved by @Hillside_Moose.
Updated by DanbooruBot
