Update mockito-core to 5.20.0 (#542)

Author: JuJup

mockito-kotlin/build.gradle

@@ -18,7 +18,7 @@ dependencies {
     compileOnly 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2'
     implementation "org.jetbrains.kotlin:kotlin-reflect:2.1.20"
 
-    api "org.mockito:mockito-core:5.17.0"
+    api "org.mockito:mockito-core:5.20.0"
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'com.nhaarman:expect.kt:1.0.1'