fix get_keyboard_fn_state to use get_bool_property
fix get_keyboard_fn_state to use get_bool_property

jgosmann/Karabiner-Elements-Neo,epegzz/Karabiner-Elements,jrolfs/Karabiner-Elements,jrolfs/Karabiner-Elements,tekezo/Karabiner-Elements,jrolfs/Karabiner-Elements,jgosmann/Karabiner-Elements-Neo,jgosmann/Karabiner-Elements-Neo,jgosmann/Karabiner-Elements-Neo,epegzz/Karabiner-Elements,jrolfs/Karabiner-Elements,epegzz/Karabiner-Elements,tekezo/Karabiner-Elements,tekezo/Karabiner-Elements,tekezo/Karabiner-Elements,epegzz/Karabiner-Elements