build(deps): bump itoa from 1.0.17 to 1.0.18 (#3981)

Bumps [itoa](https://github.com/dtolnay/itoa) from 1.0.17 to 1.0.18.
- [Release notes](https://github.com/dtolnay/itoa/releases)
- [Commits](dtolnay/itoa@1.0.17...1.0.18)

---
updated-dependencies:
- dependency-name: itoa
  dependency-version: 1.0.18
  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>
Co-authored-by: Yuki Okushi <huyuumi.dev@gmail.com>

Author: dependabot[bot]