Update Rust crate tracing to 0.1.28 (#36)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

conduit-router/Cargo.toml

@@ -10,7 +10,7 @@ edition = "2018"
 [dependencies]
 conduit = { version = "0.9.0-alpha.5", path = "../conduit" }
 route-recognizer = "0.3"
-tracing = "0.1.26"
+tracing = "0.1.28"
 
 [dev-dependencies]
 conduit-test = { version = "0.9.0-alpha.5", path = "../conduit-test" }