Keep your eye on Jasmine Mathews. The up-and-coming actress currently plays Heather on new series "Sweetbitter," based on the novel of the same name by Stephanie Danler, and will star as a totally different Heather on Paramount's upcoming reboot of—you guessed it—cult classic "Heathers." Read on as Mathews talks meditation, crystals and self-care. Tina: What…