0.23.0 has been released

Author: chriddyp

CHANGELOG.md

@@ -2,7 +2,7 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## [0.23.0] - UNRELEASED
+## [0.23.0]
 ### Added
 - Upgraded Plotly.js, the underlying library behind the
 `dash_core_components.Graph` component, to [version 1.38.0](https://github.com/plotly/plotly.js/releases/tag/v1.38.0).