Add support for HEIC images
HEIC is a newer image format that requires approximately half the amount of space of jpgs. See https://en.wikipedia.org/wiki/High_Efficiency_Image_File_Format for more info.
Please add support for native HEIC images, this will eliminate the need to first convert the images to JPG before uploading to Horizon. (Apple has been using HEIC since iOS11 and High Sierra.)