bump version to 1.3.1

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]
+## [1.3.1] - 2019-10-17
 ### Updated
 - Upgraded plotly.js to 1.50.1 [#681](https://github.com/plotly/dash-core-components/issues/681)
   - Patch release [1.50.1](https://github.com/plotly/plotly.js/releases/tag/v1.50.1) containing several bug fixes.

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "dash-core-components",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Core component suite for Dash",
   "repository": {
     "type": "git",
@@ -84,4 +84,4 @@
     "react": "^16.0.0",
     "react-dom": "^16.0.0"
   }
-}
+}