Upgrade to Tokio 1.0.0 ecosystem (#530)

* Upgrade Tonic to Tokio 1.0

Work in progress for updating Tonic to Tokio 1.0. Since tower has not
been released to crates.io, a git dependency is taken instead.

* Upgrade Tonic to Tokio 1.0 phase 2

* tonic: remove tower-* deps

* Apply suggestions from code review

Co-authored-by: Ed Marshall <[email protected]>
Co-authored-by: Lucio Franco <[email protected]>

examples/Cargo.toml

@@ -148,28 +148,29 @@ path = "src/hyper_warp_multiplex/server.rs"
 
 [dependencies]
 tonic = { path = "../tonic", features = ["tls"] }
-prost = "0.6"
-tokio = { version = "0.2", features = ["rt-threaded", "time", "stream", "fs", "macros", "uds"] }
+prost = "0.7"
+tokio = { version = "1.0", features = ["rt-multi-thread", "time", "fs", "macros", "net"] }
+tokio-stream = { version =  "0.1", features = ["net"] }
+async-stream = "0.3"
 futures = { version = "0.3", default-features = false, features = ["alloc"] }
-async-stream = "0.2"
-tower = "0.3"
+tower = { version = "0.4" }
 # Required for routeguide
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-rand = "0.7"
+rand = "0.8"
 # Tracing
 tracing = "0.1.16"
 tracing-subscriber = { version = "0.2", features = ["tracing-log"] }
 tracing-attributes = "0.1"
 tracing-futures = "0.2"
 # Required for wellknown types
-prost-types = "0.6"
+prost-types = "0.7"
 # Hyper example
-hyper = "0.13"
-warp = { version = "0.2", default-features = false }
+hyper = "0.14"
+warp = { git = "https://github.com/aknuds1/warp", branch = "chore/upgrade-tokio",  default-features = false }
 http = "0.2"
-http-body = "0.3"
-pin-project = "0.4.17"
+http-body = "0.4"
+pin-project = "1.0"
 # Health example
 tonic-health = { path = "../tonic-health" }
 listenfd = "0.3"