Update humantime requirement from 1.2.0 to 2.0.0
Update humantime requirement from 1.2.0 to 2.0.0

Updates the requirements on [humantime](https://github.com/tailhook/humantime) to permit the latest version.
- [Release notes](https://github.com/tailhook/humantime/releases)
- [Commits](https://github.com/tailhook/humantime/compare/v1.2.0...v2.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
eminence/cargo,tshepang/cargo,tshepang/cargo,tshepang/cargo,tsurai/cargo,vojtechkral/cargo,tsurai/cargo,rust-lang/cargo,vojtechkral/cargo,vojtechkral/cargo,rust-lang/cargo,rustyhorde/cargo,rust-lang/cargo,tsurai/cargo,rust-lang/cargo,tsurai/cargo,nipunn1313/cargo,eminence/cargo,nipunn1313/cargo,rustyhorde/cargo,rustyhorde/cargo,eminence/cargo,rustyhorde/cargo,eminence/cargo,tshepang/cargo,nipunn1313/cargo,tsurai/cargo,nipunn1313/cargo,vojtechkral/cargo