message: env-logger: Fix hyper breaking Rust 1.26.0 build
  Looks like hyper 0.12.26 (ironically) breaks the build on Rust 1.26.0.
  Since we only depend on it for examples, I made our dependency version
  more restrictive.
diff: @@ -13,6 +13,6 @@ tokio-trace = { git = "https://github.com/tokio-rs/tokio" }
  tokio-trace-fmt = { path = "../tokio-trace-fmt" }
  tokio-trace-futures = { path = "../tokio-trace-futures" }
  tokio-trace-subscriber = { path = "../tokio-trace-subscriber" }
  -hyper = "0.12"
  +hyper = "=0.12.25"
  futures = "0.1"
  tokio = "0.1"
  