update versions of sdl2 dependencies
update versions of sdl2 dependencies

Rust-SDL2/rust-sdl2,Cobrand/rust-sdl2,Rust-SDL2/rust-sdl2,Cobrand/rust-sdl2,Cobrand/rust-sdl2,vadixidav/rust-sdl2,andelf/rust-sdl2_mixer,AngryLawyer/rust-sdl2,Rust-SDL2/rust-sdl2,crumblingstatue/rust-sdl2_mixer