Enable tokio feature

Author: aumetra

opentelemetry-jaeger/Cargo.toml

@@ -30,7 +30,7 @@ headers = { version = "0.4.0", optional = true }
 http = { workspace = true, optional = true }
 http-body-util = { workspace = true, optional = true }
 hyper = { workspace = true, features = ["client"], optional = true }
-hyper-util = { workspace = true, features = ["client-legacy", "http1", "http2"], optional = true }
+hyper-util = { workspace = true, features = ["client-legacy", "http1", "http2", "tokio"], optional = true }
 hyper-tls = { version = "0.6.0", default-features = false, optional = true }
 js-sys = { version = "0.3", optional = true }
 opentelemetry = { version = "0.22", default-features = false, features = ["trace"], path = "../opentelemetry" }