Bump walkdir from 2.2.9 to 2.3.0 (#341)
Bump walkdir from 2.2.9 to 2.3.0 (#341)

Bumps [walkdir](https://github.com/BurntSushi/walkdir) from 2.2.9 to 2.3.0.
- [Release notes](https://github.com/BurntSushi/walkdir/releases)
- [Commits](https://github.com/BurntSushi/walkdir/compare/2.2.9...2.3.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
alex/ct-tools,alex/ct-tools