Bump arbitrary from 1.3.2 to 1.4.0

Bumps [arbitrary](https://github.com/rust-fuzz/arbitrary) from 1.3.2 to 1.4.0.
- [Changelog](https://github.com/rust-fuzz/arbitrary/blob/main/CHANGELOG.md)
- [Commits](rust-fuzz/arbitrary@v1.3.2...v1.4.0)

---
updated-dependencies:
- dependency-name: arbitrary
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>