upgrade: Rust 1.41.0 (#3838)

.github/workflows/ci.yml

@@ -45,7 +45,7 @@ jobs:
       - name: Install rust
         uses: hecrj/setup-rust-action@v1
         with:
-          rust-version: "1.40.0"
+          rust-version: "1.41.0"
 
       - name: Install clippy and rustfmt
         if: matrix.kind == 'lint'

tools/hyper_hello/hyper_hello.rs

@@ -28,8 +28,8 @@ async fn main() -> Result<(), Box<dyn Error>> {
     // `service_fn` is a helper to convert a function that
     // returns a Response into a `Service`.
     async {
-      Just::Ok(service_fn(|_req| {
-        async { Just::Ok(Response::new(Body::from(&b"Hello World!"[..]))) }
+      Just::Ok(service_fn(|_req| async {
+        Just::Ok(Response::new(Body::from(&b"Hello World!"[..])))
       }))
     }
   });