Incorrect work with delay in write function

[DanilXO]

Hello! I was working on my joke project using this library and found a strange bug. The delay parameter in the write function does not work correctly on Mac OS. We don't wait every delay time before every letter input, but wait a delay before every word input.

This is very easy to fix. Like this:

def write(text, delay=0, restore_state_after=True, exact=None):
    """
    ...
    """
    if exact is None:
        exact = _platform.system() == 'Windows'

    state = stash_state()
    
    # Window's typing of unicode characters is quite efficient and should be preferred.
    if exact:
        for letter in text:
            if letter in '\n\b':
                send(letter)
            else:
                _os_keyboard.type_unicode(letter)
            if delay: _time.sleep(delay)
    else:
        for letter in text:
            try:
                entries = _os_keyboard.map_name(normalize_name(letter))
                scan_code, modifiers = next(iter(entries))
            except (KeyError, ValueError):
                _os_keyboard.type_unicode(letter)
                # todo: We should add "if delay: _time.sleep(delay)" here.
                continue
            
            for modifier in modifiers:
                press(modifier)

            _os_keyboard.press(scan_code)
            _os_keyboard.release(scan_code)

            for modifier in modifiers:
                release(modifier)

            if delay:
                _time.sleep(delay)

    if restore_state_after:
        restore_modifiers(state)

Should I create a PR for this?

[DanilXO]

I have created PR: #583