Add mimetype for HEJ2 format
This is an image format which is already supported in development GIMP, KDE/kimageformats is going to support it soon.
The format is using similar container like HEIF but JPEG 2000 compression for image data.
This is an image format which is already supported in development GIMP, KDE/kimageformats is going to support it soon.
The format is using similar container like HEIF but JPEG 2000 compression for image data.