message: Update tower dependencies
diff: @@ -22,12 +22,12 @@ tokio = "0.1"
  tower-h2 = { git = "https://github.com/tower-rs/tower-h2" }
  tower-request-modifier = { git = "https://github.com/tower-rs/tower-http" }
  tower-service = "0.2"
  -tower-util = { git = "https://github.com/tower-rs/tower" }
  +tower-util = "0.1"
  [dependencies.tower-grpc]
  git = "https://github.com/tower-rs/tower-grpc"
  -rev = "4159eab8cf22324a25967cb33b9288f6501c0922"
  +rev = "597f56ce0eb47267a17cebe4b0120a713c12a3c0"
  [build-dependencies.tower-grpc-build]
  git = "https://github.com/tower-rs/tower-grpc"
  -rev = "4159eab8cf22324a25967cb33b9288f6501c0922"
  +rev = "597f56ce0eb47267a17cebe4b0120a713c12a3c0"
  