README.md in quiz_api_client-4.1.0 vs README.md in quiz_api_client-4.2.0

@@ -39,9 +39,13 @@
 
 ### Error Handler
 
 In order to set addition error information in your error handling system, you can set the `error_hander` property of the config.  The list of valid values can be found in the `QuizApiClient::Config::ERROR_HANDLERS` constant.
 
+### Metrics
+
+HTTP Request metrics will now be provided if the `setup_metrics` method is called.  The list of valid values can be found in the `QuizApiClient::Config::METRICS_HANDLERS` constant.  The count and duration metrics will be provided under the namespace provided.
+
 ### Creation of Tokens
 
 JWTs are created without hitting quiz_api and and they are validated on quiz_api. Tokens are created for a given scope, expiration, and an optional resource_id.
 
 Example, generate a token for building: