Bump the test-dependencies group across 1 directory with 4 updates

Bumps the test-dependencies group with 4 updates in the / directory: [org.junit.jupiter:junit-jupiter](https://github.com/junit-team/junit-framework), [org.assertj:assertj-core](https://github.com/assertj/assertj), [org.mockito:mockito-core](https://github.com/mockito/mockito) and [org.mockito:mockito-junit-jupiter](https://github.com/mockito/mockito).


Updates `org.junit.jupiter:junit-jupiter` from 5.13.3 to 6.0.0
- [Release notes](https://github.com/junit-team/junit-framework/releases)
- [Commits](junit-team/junit-framework@r5.13.3...r6.0.0)

Updates `org.assertj:assertj-core` from 3.27.3 to 3.27.6
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.27.3...assertj-build-3.27.6)

Updates `org.mockito:mockito-core` from 5.18.0 to 5.20.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.20.0)

Updates `org.mockito:mockito-junit-jupiter` from 5.18.0 to 5.20.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.20.0)

Updates `org.mockito:mockito-junit-jupiter` from 5.18.0 to 5.20.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.20.0)

---
updated-dependencies:
- dependency-name: org.junit.jupiter:junit-jupiter
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: test-dependencies
- dependency-name: org.assertj:assertj-core
  dependency-version: 3.27.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: test-dependencies
- dependency-name: org.mockito:mockito-core
  dependency-version: 5.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: test-dependencies
- dependency-name: org.mockito:mockito-junit-jupiter
  dependency-version: 5.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: test-dependencies
- dependency-name: org.mockito:mockito-junit-jupiter
  dependency-version: 5.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: test-dependencies
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 kafka = "4.0.0"
 confluent = "8.0.0"
-junit = "5.13.3"
-mockito = "5.18.0"
+junit = "6.0.0"
+mockito = "5.20.0"
 
 [libraries]
 kafka-clients = { group = "org.apache.kafka", name = "kafka-clients", version.ref = "kafka" }
@@ -37,7 +37,7 @@ jool = { group = "org.jooq", name = "jool", version = "0.9.15" }
 
 junit-platform-launcher = { group = "org.junit.platform", name = "junit-platform-launcher" }
 junit-jupiter = { group = "org.junit.jupiter", name = "junit-jupiter", version.ref = "junit" }
-assertj = { group = "org.assertj", name = "assertj-core", version = "3.27.3" }
+assertj = { group = "org.assertj", name = "assertj-core", version = "3.27.6" }
 mockito-core = { group = "org.mockito", name = "mockito-core", version.ref = "mockito" }
 mockito-junit = { group = "org.mockito", name = "mockito-junit-jupiter", version.ref = "mockito" }
 logcaptor = { group = "io.github.hakky54", name = "logcaptor", version = "2.11.0" }