Bumps [mockito-core](https://github.com/mockito/mockito) from 2.20.1 to 2.21.0. - [Release notes](https://github.com/mockito/mockito/releases) - [Commits](https://github.com/mockito/mockito/compare/v2.20.1...v2.21.0) Signed-off-by: dependabot[bot] <[email protected]>