chore(deps): bump tokio-util from 0.7.1 to 0.7.2 (gakonst#1270)

Bumps [tokio-util](https://github.com/tokio-rs/tokio) from 0.7.1 to 0.7.2.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-util-0.7.1...tokio-util-0.7.2)

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

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

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

ethers-providers/Cargo.toml

@@ -44,7 +44,7 @@ hashers = "1.0.1"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 # tokio
-tokio-util = { version = "0.7.1", default-features = false, features = ["io"], optional = true }
+tokio-util = { version = "0.7.2", default-features = false, features = ["io"], optional = true }
 tokio = { version = "1.5", default-features = false, optional = true }
 tokio-tungstenite = { version = "0.17.1", default-features = false, features = ["connect"], optional = true }