chore(deps): update dependency org.mockito:mockito-core to v4

build.gradle

@@ -47,7 +47,7 @@ dependencies {
     embed 'com.typesafe:config:1.4.1'
 
     // Testing
-    testImplementation 'org.mockito:mockito-core:3.12.4'
+    testImplementation 'org.mockito:mockito-core:4.0.0'
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
 }