chore: update CHANGELOG

Author: Tom McCarthy

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ## [0.11.0] - 2020-06-08
+### Added
+- Imports can now be made from top level of module, e.g.: `from aws_lambda_powertools import Logger, Metrics, Tracer`
+
 ### Fixed
 - **Metrics**: Fix a bug with Metrics causing an exception to be thrown when logging metrics if dimensions were not explicitly added.