Bump mockito-core from 2.23.4 to 4.1.0

Bumps [mockito-core](https://github.com/mockito/mockito) from 2.23.4 to 4.1.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v2.23.4...v4.1.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

rxjava2-jdbc/pom.xml

@@ -97,7 +97,7 @@
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>2.23.4</version>
+            <version>4.1.0</version>
             <scope>test</scope>
         </dependency>