In-source SDL2 dependency should be updated

[vinhig]

The in-source SDL2 dependency can't be built on latest arch linux due to an undefined reference to some wayland methods. Hopefully, this has been fixed here https://github.com/libsdl-org/SDL/pull/5092/commits/068c13b1cac4fead98a458b70ef482ddc8205358

[ylme]

if you use msys2, Just compile python for dependency, then use make pf PLAT=WINDOWS to compile pf.exe. Install the other dependency through msys2.

[eduard-permyakov]

SDL2 has been bumped to 2.30.0