Deny rust_2018_idioms lints in all crates except for examples.

Author: jebrosen

contrib/codegen/src/lib.rs

@@ -2,6 +2,8 @@
 #![feature(crate_visibility_modifier)]
 #![recursion_limit="256"]
 
+#![deny(rust_2018_idioms)]
+
 //! # Rocket Contrib - Code Generation
 //! This crate implements the code generation portion of the Rocket Contrib
 //! crate. This is for officially sanctioned contributor libraries that require
@@ -24,7 +26,6 @@
 //! DATABASE_NAME := (string literal)
 //! </pre>
 
-extern crate devise;
 extern crate proc_macro;
 
 #[allow(unused_imports)]

contrib/lib/src/compression/fairing.rs

@@ -144,9 +144,9 @@ impl Fairing for Compression {
         Ok(rocket.manage(ctxt))
     }
 
-    fn on_response(&self, request: &Request, response: &mut Response) {
+    fn on_response(&self, request: &Request<'_>, response: &mut Response<'_>) {
         let context = request
-            .guard::<::rocket::State<Context>>()
+            .guard::<::rocket::State<'_, Context>>()
             .expect("Compression Context registered in on_attach");
 
         super::CompressionUtils::compress_response(request, response, &context.exclusions);