Function nvim_rs::create::new_child_cmd

pub async fn new_child_cmd<'_, H>(
    cmd: &'_ mut Command, 
    handler: H
) -> Result<(Neovim<ChildStdin>, JoinHandle<Result<(), Box<LoopError>>>, Child)> where
    H: Handler<Writer = ChildStdin> + Send + 'static, 

Connect to a Neovim instance by spawning a new one

stdin/stdout will be rewritten to Stdio::piped()