Allow sending thigns like KEY_MUTE or KEY_SCAN_NEXT from the USB and
Bluetooth Classic keyboard libraries.
BLE requires some add'l magic, not yet discovered.
Pull in latest upstream Keyboard library changes
Move the Joystick, Keyboard, and Mouse into a base class which handles
the operation/input, and a subclass which will implement the reporting
as a HID device via USB, Bluetooth Classic, or Bluetooth Low Energy (BLE).
Reduce copies of library code and makes maintainability much better.
Keyboard class now has support for non-en_US layouts, and documentation has
been added to the Mouse class.
Thanks to @rico0260 for letting me know about the update, and for the initial PR!
