initialize package:sdl2-image
Initializes SDL2_image by loading support for the chosen
image formats. Explicit initialization is optional.
You should call this function if you prefer to load image support
yourself, at a time when your process isn't as busy. Otherwise, image
support will be loaded dynamically when you attempt to load a
JPG, PNG, TIF or WEBP-formatted
file.
You may call this function multiple times.