SDL2-2.30.0

[Bruce Dubbs]

New minor version.

[Douglas R. Reno]

This is a release candidate for 2.30

[Joe Locash]

Now at 2.30.0

Thanks to all the people who contributed code and feedback, SDL 2.30.0 is now available!

In addition to lots of bug fixes, here are the major changes in this release:

General:

    Added support for 2 bits-per-pixel indexed surface formats
    Added the function SDL_GameControllerGetSteamHandle() to get the Steam API handle for a controller, if available
    Added the event SDL_CONTROLLERSTEAMHANDLEUPDATED which is sent when the Steam API handle for a controller changes. This could also change the name, VID, and PID of the controller.
    Added the environment variable SDL_LOGGING to control default log output

macOS:

    Added the hint SDL_HINT_JOYSTICK_IOKIT to control whether the IOKit controller driver should be used
    Added the hint SDL_HINT_JOYSTICK_MFI to control whether the GCController controller driver should be used
    Added the hint SDL_HINT_RENDER_METAL_PREFER_LOW_POWER_DEVICE to choose whether high or low power GPU should be used for rendering, in the case where there are multiple GPUs available

Xbox:

    Added the function SDL_GDKGetDefaultUser()

[Bruce Dubbs]

Fixed at commits

0ef09874d9 Update to libusb-1.0.27.
b859f299d1 Update to SDL2-2.30.0.