Replace futures with futures-util in examples dependency (#435)

Author: tottoto

examples/tonic-key-value-store/Cargo.toml

@@ -11,7 +11,7 @@ bytes = "1"
 hyper = { version = "0.14.4", features = ["full"] }
 prost = "0.11"
 tokio = { version = "1.2.0", features = ["full"] }
-futures = "0.3"
+futures-util = { version = "0.3", default-features = false }
 tokio-stream = { version = "0.1", features = ["sync", "net"] }
 tonic = "0.9"
 tower = { version = "0.5", features = ["full"] }

examples/tonic-key-value-store/src/main.rs

@@ -5,7 +5,7 @@ fn main() {
 /*
 use bytes::Bytes;
 use clap::Parser;
-use futures::StreamExt;
+use futures_util::StreamExt;
 use hyper::{
     body::HttpBody,
     header::{self, HeaderValue},