Bump org.mockito:mockito-core from 5.5.0 to 5.6.0

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 5.5.0 to 5.6.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.5.0...v5.6.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -49,7 +49,7 @@ sourceSets {
 dependencies {
     implementation 'io.reactivex.rxjava3:rxjava:3.1.8'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0'
-    testImplementation 'org.mockito:mockito-core:5.5.0'
+    testImplementation 'org.mockito:mockito-core:5.6.0'
     testImplementation 'org.assertj:assertj-core:3.24.2'
     testImplementation 'org.mockito:mockito-junit-jupiter:5.5.0'
     testImplementation 'com.github.stefanbirkner:system-lambda:1.2.1'