Charli XCX has been making futuristic electro-pop since her 2013 début, “True Romance,” but with her new album, “How I’m Feeling Now,” produced in quarantine at her home in L.A. (where she is pictured), the English singer-songwriter creates music for the present. The singles “Forever” and “Claws” crackle, smolder, and otherwise short-circuit, as though Charli’s electronic devices cannot withstand the intensity of her desire for human connection. “I’ll love you forever,” she sings, “even when we’re not together.”