Function makeKeyEvent

makeKeyEvent(key: string, isDown: boolean): HSEventTapEvent | null
Create a keyboard event
Parameters
- key: string
  A key name (e.g. "a", "space", "return", "f1") or numeric key code string
- isDown: boolean
  true for key down, false for key up
Returns HSEventTapEvent | null
An HSEventTapEvent, or null if the key name is unknown