conditionally apply async dispatcher macros for testing

Cargo.toml

@@ -13,6 +13,7 @@ default = ["tokio-runtime", "all-transport"]
 tokio-runtime = ["tokio", "tokio-util"]
 async-std-runtime = ["async-std"]
 async-dispatcher-runtime = ["async-std", "async-dispatcher"]
+async-dispatcher-macros = ["async-dispatcher/macros"]
 all-transport = ["ipc-transport", "tcp-transport"]
 ipc-transport = []
 tcp-transport = []

src/async_rt/mod.rs

@@ -12,5 +12,8 @@ extern crate async_std;
 #[cfg(feature = "async-std-runtime")]
 pub use async_std::{main, test};
 
-#[cfg(feature = "async-dispatcher-runtime")]
+#[cfg(all(
+    feature = "async-dispatcher-runtime",
+    feature = "async-dispatcher-macros"
+))]
 pub use async_dispatcher::{main, test};