Bump mockito-core from 2.25.1 to 2.26.0

Bumps [mockito-core](https://github.com/mockito/mockito) from 2.25.1 to 2.26.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v2.25.1...v2.26.0)

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

build.gradle

@@ -285,7 +285,7 @@ dependencies {
 
     // dependencies for local unit tests
     testImplementation 'junit:junit:4.12'
-    testImplementation 'org.mockito:mockito-core:2.25.1'
+    testImplementation 'org.mockito:mockito-core:2.26.0'
     testImplementation 'androidx.test:core:1.1.0'
 
     // dependencies for instrumented tests