feat(pool): import client::pool from hyper (#3)

cc hyperium/hyper#2860

Author: dswij

Cargo.toml

@@ -15,6 +15,8 @@ edition = "2018"
 publish = false # no accidents while in dev
 
 [dependencies]
+hyper = "0.14.19"
+futures-channel = "0.3"
 futures-util = { version = "0.3", default-features = false }
 http = "0.2"
 pin-project-lite = "0.2.4"

src/client/client.rs

@@ -0,0 +1,7 @@
+/// A marker to identify what version a pooled connection is.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+#[allow(dead_code)]
+pub(super) enum Ver {
+    Auto,
+    Http2,
+}

src/client/mod.rs

@@ -1,3 +1,6 @@
 //! HTTP client utilities
+#![allow(missing_docs)]
 
+pub mod client;
 pub mod connect;
+pub mod pool;