Bump unicode-segmentation from 1.6.0 to 1.7.0 (#753)
Bump unicode-segmentation from 1.6.0 to 1.7.0 (#753)

Bumps [unicode-segmentation](https://github.com/unicode-rs/unicode-segmentation) from 1.6.0 to 1.7.0.
- [Release notes](https://github.com/unicode-rs/unicode-segmentation/releases)
- [Commits](https://github.com/unicode-rs/unicode-segmentation/commits)

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

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