Bump futures-util from 0.3.21 to 0.3.23 (#5922)

* Bump futures-util from 0.3.21 to 0.3.23

Bumps [futures-util](https://github.com/rust-lang/futures-rs) from 0.3.21 to 0.3.23.
- [Release notes](https://github.com/rust-lang/futures-rs/releases)
- [Changelog](https://github.com/rust-lang/futures-rs/blob/master/CHANGELOG.md)
- [Commits](rust-lang/futures-rs@0.3.21...0.3.23)

---
updated-dependencies:
- dependency-name: futures-util
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix deprecated warning

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

node/subsystem-util/src/determine_new_blocks.rs

@@ -124,7 +124,7 @@ where
 						Ok(Ok(h)) => h,
 					}
 				})
-				.for_each(|x| requests.push(x));
+				.for_each(|x| requests.push_back(x));
 
 			let batch_headers: Vec<_> =
 				requests.flat_map(|x: Option<Header>| stream::iter(x)).collect().await;

node/zombienet-backchannel/Cargo.toml

@@ -12,7 +12,7 @@ publish = false
 tokio = { version = "1.19.2", default-features = false, features = ["macros", "net", "rt-multi-thread", "sync"] }
 url = "2.0.0"
 tokio-tungstenite = "0.17"
-futures-util = "0.3.21"
+futures-util = "0.3.23"
 lazy_static = "1.4.0"
 parity-scale-codec = { version = "3.1.5", features = ["derive"] }
 reqwest = "0.11"