The Boston Calling 2020 music festival has been canceled because of the new coronavirus, its organizers said on the festival’s website Tuesday. The organizers said the health and wellbeing of all who are involved, from the artists to the audience to the support staff, was their primary concern, though the move left them “heartbroken.” Ticketholders will have several options available to them, including “full refund or rolling tickets to next year’s event,” the organizers said, adding that they would reach out in weeks.