Bump nom from 6.2.0 to 6.2.1

Bumps [nom](https://github.com/Geal/nom) from 6.2.0 to 6.2.1.
- [Release notes](https://github.com/Geal/nom/releases)
- [Changelog](https://github.com/Geal/nom/blob/master/CHANGELOG.md)
- [Commits](rust-bakery/nom@6.2.0...6.2.1)

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

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