[tracing-attributes] future-proof the #[instrument] integration with async-trait

Author: nightmared

Cargo.toml

@@ -17,3 +17,6 @@ members = [
     "tracing-journald",
     "examples"
 ]
+
+[patch.crates-io]
+async-trait = { git = "https://github.com/SergioBenitez/async-trait", branch = "master" }