examples/Cargo.toml: tracing-subscriber update
It was required due to the book using `extern crate` syntax. Divergence
of version used across the project caused ambiguity and errors on book
tests build.
@@ -13,7 +13,7 @@ rustyline-derive = "0.6"
scylla = {path = "../scylla", features = ["ssl"]}
tokio = {version = "1.1.0", features = ["full"]}
tracing = "0.1.25"
-tracing-subscriber = "0.2.16"
+tracing-subscriber = "0.3.14"
chrono = "0.4"
uuid = "1.0"
tower = "0.4"
