Update README.md

README.md

@@ -54,8 +54,10 @@ const users = [
   { "id": 3, "name": "Francesco", "age": 24 }
 ]
 
-/* response mocks for /users */
-module.exports = [
+module.exports = MockBase => class MockUsers extends MockBase {
+  mocks () {
+    /* response mocks for /users */
+    return [
       {
         route: '/users',
         responses: [
@@ -80,7 +82,9 @@ module.exports = [
           }
         ]
       }
-]
+    ]
+  }
+}
 ```
 
 Next, launch `ws` passing in your mock response file: