Bump mockitoVersion from 3.11.2 to 3.12.4

Bumps `mockitoVersion` from 3.11.2 to 3.12.4.

Updates `mockito-core` from 3.11.2 to 3.12.4
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v3.11.2...v3.12.4)

Updates `mockito-android` from 3.11.2 to 3.12.4
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v3.11.2...v3.12.4)

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

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -61,7 +61,7 @@ ext {
     markwonVersion =  "4.6.2"
     prismVersion = "2.0.0"
     androidLibraryVersion = "master-SNAPSHOT"
-    mockitoVersion = "3.11.2"
+    mockitoVersion = "3.12.4"
     mockkVersion = "1.10.4"
     powermockVersion = "2.0.9"
     byteBuddyVersion = "1.11.15"