feat(client): provide tower::Service support for clients (#1915)

examples/tower_client.rs

@@ -0,0 +1,26 @@
+
+use hyper::client::service::{Connect, Service, MakeService};
+use hyper::client::conn::Builder;
+use hyper::client::connect::HttpConnector;
+use hyper::{Body, Request};
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    pretty_env_logger::init();
+
+    let mut mk_svc = Connect::new(HttpConnector::new(), Builder::new());
+
+    let uri = "http://127.0.0.1:8080".parse::<http::Uri>()?;
+
+
+    let mut svc = mk_svc.make_service(uri.clone()).await?;
+
+    let body = Body::empty();
+
+    let req = Request::get(uri).body(body)?;
+    let res = svc.call(req).await?;
+
+    println!("RESPONSE={:?}", res);
+
+    Ok(())
+}