Pysdl2-dll

- Bumped the SDL2 binary version from 2.26.0 to 2.26.1.

- Bumped the SDL2 binary version from 2.24.2 to 2.26.0.

- Bumped the SDL2 binary version from 2.24.1 to 2.24.2.

- Bumped the SDL2 binary version from 2.24.0 to 2.24.1.

- Bumped the SDL2 binary version from 2.0.22 to 2.24.0.

- Bumped the SDL2\_mixer binary version from 2.0.4 to 2.6.0.
- Bumped the SDL2\_image binary version from 2.0.5 to 2.6.0.
- Bumped the SDL2\_ttf binary version from 2.0.18 to 2.20.0.
- Migrated the build system for the mixer, image, and ttf binaries to CMake.
- Added universal2 wheels for Apple Silicon Macs now that all the official binaries are ARM-native.