DigiKeyboard.h F20 and other keys above 101 not supported

[Tatu Wikman]

Discussed in #23

Hid descriptor defines the keyboard as 101 this prevents all the keys above 101 from being recognized. (

DigistumpArduino/digistump-avr/libraries/DigisparkKeyboard/DigiKeyboard.h

Line 49 in 50ac9cf

 0x25, 0x65,                    //   LOGICAL_MAXIMUM (101) 

)

Increasing the descriptor to 115 allows F20 key to be sent (F20 is 111 and F24 is 115)