Bump mockito-core from 2.1.0 to 3.1.0 (#21)
Bump mockito-core from 2.1.0 to 3.1.0 (#21)

Bumps [mockito-core](https://github.com/mockito/mockito) from 2.1.0 to 3.1.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v2.1.0...v3.1.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
akarnokd/akarnokd-misc,akarnokd/akarnokd-misc