Windows Double KeyPress Issue

[0Ky]

On Windows, a single keypress is mistakenly detected twice: once on KeyDown and again on KeyUp.
This issue stems from crossterm, you will need to check the KeyEventKind:

if let Event::Key(key) = event {
    if key.kind == KeyEventKind::Press {
        ...
    }
}

[radlinskii]

Let's keep this as separate issue, but also added it as part of #37