如何使用Rust中新的async-await语法通过H2发出HTTP2请求？

[dependencies]
h2 = "0.3"
tokio = { version = "1", features = ["full"] }

use h2::client::Builder;
use h2::client::handshake::Handshake;
use h2::client::SendRequest;
use h2::RecvStream;
use tokio::net::TcpStream;
use tokio::runtime::Runtime;

async fn send_http2_request() -> Result<(), Box<dyn std::error::Error>> {
    // 创建一个TCP连接
    let tcp = TcpStream::connect("your_server_address").await?;

    // 创建一个H2客户端构建器
    let mut builder = Builder::new();

    // 发起与服务器的握手
    let (h2, connection) = builder.handshake(tcp).await?;

    // 创建一个请求
    let (response, _) = h2.send_request(Default::default(), false)?;

    // 等待响应
    let response = response.await?;

    // 处理响应
    let (parts, body) = response.into_parts();
    let body = body.unwrap().into_bytes().await?;

    // 打印响应信息
    println!("Response status: {:?}", parts.status);
    println!("Response headers: {:?}", parts.headers);
    println!("Response body: {:?}", body);

    // 关闭连接
    connection.await?;

    Ok(())
}

fn main() {
    let mut runtime = Runtime::new().unwrap();
    runtime.block_on(send_http2_request()).unwrap();
}