upgrade util version

Author: chertov

crates/mdns/Cargo.toml

@@ -16,7 +16,7 @@ default = [ "reuse_port" ]
 reuse_port = []
 
 [dependencies]
-util = { package = "webrtc-util", version = "0.1.18", default-features = false, features = ["error", "ifaces"] }
+util = { package = "webrtc-util", version = "0.1.19", default-features = false, features = ["error", "ifaces"] }
 lazy_static = "1.3.0"
 tokio = { version = "^1.0", features = ["full"] }
 log = "0.4"