Use up-rust with updated submodule url

Author: AnotherDaniel

Cargo.lock

@@ -37,7 +37,7 @@ protobuf = { version = "3.7.2" }
 test-case = { version = "3.3" }
 tokio = { version = "1", features = ["full"] }
 #up-rust = { version = "0.6.0", features = ["usubscription"] }
-up-rust = { git = "https://github.com/eclipse-uprotocol/up-rust.git", rev = "66ee4a1", features = ["usubscription"] }
+up-rust = { git = "https://github.com/eclipse-uprotocol/up-rust.git", rev = "ca4f39d067d0e869d1e17f36681463ffd73643fd", features = ["usubscription"] }
 up-subscription = { path = "./up-subscription" }
 
 # Config for 'cargo dist'