Bump chrono from 0.4.11 to 0.4.12 (#620)
Bump chrono from 0.4.11 to 0.4.12 (#620)

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.11 to 0.4.12.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/master/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono/compare/v0.4.11...v0.4.12)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
alex/ct-tools,alex/ct-tools