Pysdl2-dll

- Bumped the SDL2 binary version from 2.28.4 to 2.28.5.
- Bumped the SDL2\_image binary version from 2.6.0 to 2.8.1.

- Bumped the SDL2 binary version from 2.28.2 to 2.28.4.

- Bumped the SDL2 binary version from 2.28.0 to 2.28.2.

- Bumped the SDL2 binary version from 2.26.5 to 2.28.0.

- Bumped the SDL2 binary version from 2.26.2 to 2.26.5.
- Due to an upstream change in SDL2, the minimum supported macOS release is now 10.11.
- Updated the 'modern' Linux wheels from `manylinux_2_24` to `manylinux_2_28`. This pushes some older distros (e.g. Ubuntu < 18.04) back to the 'legacy' `manylinux2014` wheels, but adds libdecor support to the 'modern' wheels for better Wayland support.
- Removed Network Audio System (`libaudio`) support from the 'modern' Linux wheels (if this is a problem for anyone, please let me know and I'll try to re-add it).
- Added sndio and JACK audio support to the 'legacy' Linux wheels.

- Bumped the SDL2 binary version from 2.26.1 to 2.26.2.