Update artifactory requirement from ~> 2.0 to ~> 3.0
Update artifactory requirement from ~> 2.0 to ~> 3.0

Updates the requirements on [artifactory](https://github.com/opscode/artifactory-client) to permit the latest version.
- [Release notes](https://github.com/opscode/artifactory-client/releases)
- [Changelog](https://github.com/chef/artifactory-client/blob/master/CHANGELOG.md)
- [Commits](https://github.com/opscode/artifactory-client/compare/v2.0.0...v3.0.5)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
rapid7/omnibus,rapid7/omnibus,chef/omnibus,chef/omnibus,chef/omnibus,rapid7/omnibus