Wraps TTF_SetFontScriptName (from SDL_ttf 2.20) to set the dsdl2.ttf.Font's script name
new script name for the dsdl2.ttf.Font
dsdl.SDLException if unable to set script name
See Implementation
Wraps TTF_SetFontScriptName (from SDL_ttf 2.20) to set the dsdl2.ttf.Font's script name