Bump mockito-core from 2.28.2 to 3.0.0 (#5107)

Bumps [mockito-core](https://github.com/mockito/mockito) from 2.28.2 to 3.0.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v2.28.2...v3.0.0)

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

build.gradle

@@ -163,7 +163,7 @@ dependencies {
 
     testRuntime 'org.apache.logging.log4j:log4j-core:2.12.0'
     testRuntime 'org.apache.logging.log4j:log4j-jul:2.12.0'
-    testCompile 'org.mockito:mockito-core:2.28.2'
+    testCompile 'org.mockito:mockito-core:3.0.0'
     testCompile 'com.github.tomakehurst:wiremock:2.23.2'
     testCompile 'org.reflections:reflections:0.9.11'
     testCompile 'org.xmlunit:xmlunit-core:2.6.3'