Bump mockito-core from 2.13.0 to 2.23.0

Bumps [mockito-core](https://github.com/mockito/mockito) from 2.13.0 to 2.23.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v2.13.0...v2.23.0)

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

Author: dependabot-support

build.gradle

@@ -33,7 +33,7 @@ dependencies {
     testImplementation 'org.glassfish:javax.json:1.1.4'
     testImplementation 'org.junit.jupiter:junit-jupiter-engine'
     testImplementation 'org.assertj:assertj-core:3.11.1'
-    testImplementation 'org.mockito:mockito-core:2.13.0'
+    testImplementation 'org.mockito:mockito-core:2.23.0'
 }
 
 test {