Move TypedHeader to axum-extra (#1850)

Co-authored-by: Michael Scofield <[email protected]>
Co-authored-by: Jonas Platte <[email protected]>

examples/sse/Cargo.toml

@@ -5,7 +5,8 @@ edition = "2021"
 publish = false
 
 [dependencies]
-axum = { path = "../../axum", features = ["headers"] }
+axum = { path = "../../axum" }
+axum-extra = { path = "../../axum-extra", features = ["typed-header"] }
 futures = "0.3"
 headers = "0.3"
 tokio = { version = "1.0", features = ["full"] }

examples/sse/src/main.rs

@@ -5,11 +5,11 @@
 //! ```
 
 use axum::{
-    extract::TypedHeader,
     response::sse::{Event, Sse},
     routing::get,
     Router,
 };
+use axum_extra::{headers, TypedHeader};
 use futures::stream::{self, Stream};
 use std::{convert::Infallible, path::PathBuf, time::Duration};
 use tokio_stream::StreamExt as _;