Update mockito requirement from 0.15 to 0.16
Update mockito requirement from 0.15 to 0.16

Updates the requirements on [mockito](https://github.com/lipanski/mockito) to permit the latest version.
- [Release notes](https://github.com/lipanski/mockito/releases)
- [Commits](https://github.com/lipanski/mockito/compare/0.15.0...0.16.0)

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