Bump mockito-core from 2.28.2 to 3.0.0

Bumps [mockito-core](https://github.com/mockito/mockito) from 2.28.2 to 3.0.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v2.28.2...v3.0.0)

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

build.gradle

@@ -298,7 +298,7 @@ dependencies {
 
     // dependencies for local unit tests
     testImplementation 'junit:junit:4.12'
-    testImplementation 'org.mockito:mockito-core:2.28.2'
+    testImplementation 'org.mockito:mockito-core:3.0.0'
     testImplementation 'androidx.test:core:1.2.0'
     testImplementation 'org.powermock:powermock-core:2.0.2'
     testImplementation 'org.powermock:powermock-module-junit4:2.0.2'