build(deps): bump num from 0.4.2 to 0.4.3

Bumps [num](https://github.com/rust-num/num) from 0.4.2 to 0.4.3.
- [Changelog](https://github.com/rust-num/num/blob/master/RELEASES.md)
- [Commits](rust-num/num@num-0.4.2...num-0.4.3)

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

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