macOS: CapsLock not working

[pentamassiv]

Describe the bug
CapsLock seems to have no effect

To Reproduce

use enigo::{Enigo, Key, KeyboardControllable};
use std::thread;
use std::time::Duration;

fn main() {
    thread::sleep(Duration::from_secs(2));
    let mut enigo = Enigo::new();

    enigo.key_click(Key::Layout('a'));
    enigo.key_click(Key::CapsLock);
    enigo.key_click(Key::Layout('a'));
}

Expected behavior
The letters aA should be typed.

Environment (please complete the following information):

• OS:macOS
• Rust [e.g. rustc --version]
• enigo 0.0.15

Additional context
This seems to be a know issue. I only found out about it because I read: https://eastmanreference.com/complete-list-of-applescript-key-codes

[pentamassiv]

Instead of CapsLock, the shift can get activated. We need to store the shift state so we can toggle it