chore: bump tokio-util from 0.6.9 to 0.7.1 (backport #213)

[mergify]

This is an automatic backport of pull request #213 done by Mergify.
Cherry-pick of 0d773bd has failed:

On branch mergify/bp/v1.9/pr-213
Your branch is up to date with 'origin/v1.9'.

You are currently cherry-picking commit 0d773bd13.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   rpc/Cargo.toml
	modified:   web3.js/package-lock.json
	modified:   web3.js/package.json
	modified:   web3.js/yarn.lock

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   Cargo.lock
	both modified:   accounts-bench/Cargo.toml
	both modified:   accounts-cluster-bench/Cargo.toml
	both modified:   banking-bench/Cargo.toml
	both modified:   bench-tps/Cargo.toml
	both modified:   bloom/Cargo.toml
	both modified:   clap-utils/Cargo.toml
	both modified:   cli/Cargo.toml
	both modified:   client/Cargo.toml
	both modified:   core/Cargo.toml
	both modified:   dos/Cargo.toml
	both modified:   entry/Cargo.toml
	both modified:   faucet/Cargo.toml
	both modified:   genesis/Cargo.toml
	both modified:   gossip/Cargo.toml
	both modified:   ledger-tool/Cargo.toml
	both modified:   local-cluster/Cargo.toml
	both modified:   merkle-root-bench/Cargo.toml
	both modified:   metrics/Cargo.toml
	both modified:   net-shaper/Cargo.toml
	both modified:   net-utils/Cargo.toml
	both modified:   perf/Cargo.toml
	both modified:   poh-bench/Cargo.toml
	both modified:   poh/Cargo.toml
	both modified:   programs/bpf_loader/Cargo.toml
	both modified:   programs/ed25519-tests/Cargo.toml
	both modified:   rbpf-cli/Cargo.toml
	both modified:   runtime/store-tool/Cargo.toml
	both modified:   sdk/cargo-build-bpf/Cargo.toml
	both modified:   sdk/cargo-test-bpf/Cargo.toml
	both modified:   stake-accounts/Cargo.toml
	both modified:   sys-tuner/Cargo.toml
	both modified:   transaction-dos/Cargo.toml
	both modified:   validator/Cargo.toml
	both modified:   watchtower/Cargo.toml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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