refactor(middleware): change visibility to pub (#587)

crates/router/src/lib.rs

@@ -15,7 +15,7 @@ pub(crate) mod macros;
 pub mod routes;
 pub mod scheduler;
 
-mod middleware;
+pub mod middleware;
 #[cfg(feature = "openapi")]
 pub mod openapi;
 pub mod services;

crates/router/src/middleware.rs

@@ -1,5 +1,5 @@
 /// Middleware to include request ID in response header.
-pub(crate) struct RequestId;
+pub struct RequestId;
 
 impl<S, B> actix_web::dev::Transform<S, actix_web::dev::ServiceRequest> for RequestId
 where
@@ -22,7 +22,7 @@ where
     }
 }
 
-pub(crate) struct RequestIdMiddleware<S> {
+pub struct RequestIdMiddleware<S> {
     service: S,
 }