conditional test compilation [range, charset] (#1483)

* conditionally compile range and charset tests

* remove deprecated try macros

Co-authored-by: Yuki Okushi <huyuumi.dev@gmail.com>

src/config.rs

@@ -123,6 +123,7 @@ impl AppService {
     }
 }
 
+/// Application connection config
 #[derive(Clone)]
 pub struct AppConfig(Rc<AppConfigInner>);