This release adds the possibility to set GPIO pins as outputs on a mapping.
An output value of "0" drives the pin low and an output value of "1" drives the pin high. You can use it directly with LEDs, for example to make a CapsLock LED or to visualize layer state. If you want to use the outputs to drive other devices like the Xbox Adaptive Controller, you should probably use additional hardware such as optocouplers.
Also all GPIO pins that aren't used for other functions should now be usable as inputs/outputs (previously limited to GPIO2-GPIO9).