Bump version to 1.9.0

Author: Marc-André Rivet

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/).
 
-## [Unreleased]
+## [1.9.0] - 2020-04-01
 ### Changed
 - [#766](https://github.com/plotly/dash-core-components/pull/766) Update from React 16.8.6 to 16.13.0
 - [#768](https://github.com/plotly/dash-core-components/pull/768) Added title property to dcc.Link

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dash-core-components",
-  "version": "1.8.1",
+  "version": "1.9.0",
   "description": "Core component suite for Dash",
   "repository": {
     "type": "git",