(Credit: Getty/Robyn) Kate McKinnon is having a very good year. After winning a much-deserved Emmy for killing it on “Saturday Night Live,” the gifted comedienne is set to headline her first star vehicle. The 32-year-old has reportedly signed on to play the title role in “The Lunch Witch,” an adaptation of a young adult novel about an evil sorceress who takes a job at a school cafeteria.