message: subscriber: fix git dep
diff: @@ -37,7 +37,7 @@ tracing-fmt = "0.0.1-alpha.2"
  tracing = "0.1"
  # load generator demo
  -tracing-tower = { path = "../tracing-tower" }
  +tracing-tower = { version = "0.1.0", path = "../tracing-tower" }
  tower = "0.1"
  tower-hyper = "0.1"
  tower-http-util = "0.1"
  