Merge pull request #1620 from nextcloud/dependabot/gradle/org.mockito-mockito-core-4.0.0

Bump mockito-core from 3.12.4 to 4.0.0

app/build.gradle

@@ -295,7 +295,7 @@ dependencies {
     implementation 'androidx.core:core-ktx:1.6.0'
 
     testImplementation 'junit:junit:4.13.2'
-    testImplementation 'org.mockito:mockito-core:3.12.4'
+    testImplementation 'org.mockito:mockito-core:4.0.0'
     testImplementation "org.powermock:powermock-core:${powermockVersion}"
     testImplementation "org.powermock:powermock-module-junit4:${powermockVersion}"
     testImplementation "org.powermock:powermock-api-mockito2:${powermockVersion}"