Update tower dependency from 0.4.13 to 0.5.1

Cargo.toml

@@ -52,7 +52,7 @@ serde_path_to_error = "0.1.4"
 serde_urlencoded = "0.7.1"
 snafu = "0.8"
 tokio = { version = "1.17.0", default-features = false, features = ["time"], optional = true }
-tower = { version = "0.4.13", default-features = false, features = ["util", "buffer"] }
+tower = { version = "0.5.1", default-features = false, features = ["util", "buffer"] }
 tower-http = { version = "0.6.1", features = ["map-response-body", "trace"] }
 tracing = { version = "0.1.37", features = ["log"], optional = true }
 url = { version = "2.2.2", features = ["serde"] }

src/lib.rs

@@ -947,8 +947,8 @@ pub enum AuthState {
 }
 
 pub type OctocrabService = Buffer<
-    BoxService<http::Request<OctoBody>, http::Response<BoxBody<Bytes, Error>>, BoxError>,
     http::Request<OctoBody>,
+    <BoxService<http::Request<OctoBody>, http::Response<BoxBody<Bytes, Error>>, BoxError> as tower::Service<http::Request<OctoBody>>>::Future
 >;
 
 /// The GitHub API client.

src/service/middleware/retry.rs

@@ -12,20 +12,21 @@ pub enum RetryConfig {
 }
 
 impl<B> Policy<Request<OctoBody>, Response<B>, Error> for RetryConfig {
-    type Future = futures_util::future::Ready<Self>;
+    type Future = futures_util::future::Ready<()>;
 
     fn retry(
-        &self,
-        _req: &Request<OctoBody>,
-        result: Result<&Response<B>, &Error>,
+        &mut self,
+        _req: &mut Request<OctoBody>,
+        result: &mut Result<Response<B>, Error>,
     ) -> Option<Self::Future> {
         match self {
             RetryConfig::None => None,
             RetryConfig::Simple(count) => match result {
                 Ok(response) => {
                     if response.status().is_server_error() || response.status() == 429 {
                         if *count > 0 {
-                            Some(future::ready(RetryConfig::Simple(count - 1)))
+                            *count -= 1;
+                            Some(future::ready(()))
                         } else {
                             None
                         }
@@ -35,7 +36,8 @@ impl<B> Policy<Request<OctoBody>, Response<B>, Error> for RetryConfig {
                 }
                 Err(_) => {
                     if *count > 0 {
-                        Some(future::ready(RetryConfig::Simple(count - 1)))
+                        *count -= 1;
+                        Some(future::ready(()))
                     } else {
                         None
                     }
@@ -44,7 +46,7 @@ impl<B> Policy<Request<OctoBody>, Response<B>, Error> for RetryConfig {
         }
     }
 
-    fn clone_request(&self, req: &Request<OctoBody>) -> Option<Request<OctoBody>> {
+    fn clone_request(&mut self, req: &Request<OctoBody>) -> Option<Request<OctoBody>> {
         match self {
             RetryConfig::None => None,
             _ => {