SPOILER ALERT: This article contains spoilers from “M3GAN 2.0,” in theaters now. M3GAN slays, but Allison Williams is mother. The “Girls” alum reprises her role as reluctant guardian and brilliant roboticist Gemma in “M3GAN 2.0,” also returning as a producer for the film from Blumhouse and Universal. The sequel sees Gemma and her niece Cady […]