Bump org.mockito:mockito-core from 2.8.9 to 2.28.2

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 2.8.9 to 2.28.2.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v2.8.9...v2.28.2)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-version: 2.28.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build.gradle

@@ -133,7 +133,7 @@ dependencies {
     testImplementation 'org.bouncycastle:bcprov-jdk15on:1.64'
     testImplementation 'org.hamcrest:java-hamcrest:2.0.0.0'
     testImplementation 'org.hamcrest:hamcrest-core:1.3'
-    testImplementation 'org.mockito:mockito-core:2.8.9'
+    testImplementation 'org.mockito:mockito-core:2.28.2'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.8.1'
     testImplementation 'org.springframework:spring-test:4.3.14.RELEASE'
     testImplementation 'com.squareup.okhttp3:okhttp:4.12.0'