chore(lib): update to 2021 edition

Author: seanmonstar

Cargo.toml

@@ -10,7 +10,7 @@ license = "MIT"
 authors = ["Sean McArthur <[email protected]>"]
 keywords = ["http", "hyper", "hyperium"]
 categories = ["network-programming", "web-programming::http-client", "web-programming::http-server"]
-edition = "2018"
+edition = "2021"
 rust-version = "1.63" # keep in sync with MSRV.md dev doc
 
 include = [

benches/end_to_end.rs

@@ -413,6 +413,7 @@ fn spawn_server(rt: &tokio::runtime::Runtime, opts: &Opts) -> SocketAddr {
     let body = opts.response_body;
     let opts = opts.clone();
     rt.spawn(async move {
+        let _ = &opts;
         while let Ok((sock, _)) = listener.accept().await {
             let io = support::TokioIo::new(sock);
             if opts.http2 {

src/ffi/body.rs

@@ -150,6 +150,7 @@ ffi_fn! {
         let userdata = UserDataPointer(userdata);
 
         Box::into_raw(hyper_task::boxed(async move {
+            let _ = &userdata;
             while let Some(item) = body.0.frame().await {
                 let frame = item?;
                 if let Ok(chunk) = frame.into_data() {