Update tracing-subscriber crate to 0.3.16 (rust-lang#68)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Cargo.lock

@@ -25,4 +25,4 @@ tower-service = "0.3"
 conduit-router = "0.10.0"
 futures-util = "0.3"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
-tracing-subscriber = "0.3.7"
+tracing-subscriber = "0.3.16"