Maggie Rogers’ debut EP won’t be for everyone, but you’ll be glad you found it if it hits you in the right place. And that place is somewhere in the middle of beats and a gifted voice. Sunnier than Banks and Sharon Van Etten, darker than Maren Morris, Rogers is only 22, and her song “Alaska,” included here, has already caught the ear of Pharrell William — made him cry, even. “Dog Years” and “On + Off” are up to the challenge, too. This feels like the beginning of a versatile career.