Bump futures from 0.3.16 to 0.3.19 (#10930)

Bumps [futures](https://github.com/rust-lang/futures-rs) from 0.3.16 to 0.3.19.
- [Release notes](https://github.com/rust-lang/futures-rs/releases)
- [Changelog](https://github.com/rust-lang/futures-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/futures-rs/compare/0.3.16...0.3.19)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

substrate/client/peerset/Cargo.toml

@@ -14,7 +14,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-futures = "0.3.9"
+futures = "0.3.19"
 libp2p = { version = "0.40.0", default-features = false }
 sc-utils = { version = "4.0.0-dev", path = "../utils"}
 log = "0.4.8"