Bump mockito-core from 2.23.4 to 2.24.0 (#4626)

Bumps [mockito-core](https://github.com/mockito/mockito) from 2.23.4 to 2.24.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v2.23.4...v2.24.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Diff for: build.gradle

@@ -170,7 +170,7 @@ dependencies {
     testCompile 'org.junit-pioneer:junit-pioneer:0.3.0'
     testRuntime 'org.apache.logging.log4j:log4j-core:2.11.1'
     testRuntime 'org.apache.logging.log4j:log4j-jul:2.11.1'
-    testCompile 'org.mockito:mockito-core:2.23.4'
+    testCompile 'org.mockito:mockito-core:2.24.0'
     testCompile 'com.github.tomakehurst:wiremock:2.21.0'
     testCompile 'org.assertj:assertj-swing-junit:3.8.0'
     testCompile 'org.reflections:reflections:0.9.11'