Pin<Input<Floating>, Dynamic> has pullup enabled

[kabel42]

After calling into_floating_input() on a dynamic pin the pullup is enabled

Example:

fn main() -> ! {
    let dp = arduino_hal::Peripherals::take().unwrap();
    let pins = arduino_hal::pins!(dp);

    let mut pin3 = pins.d3.downgrade();
    pin3 = pin3.into_floating_input();
    loop {}
}