Add key to rendered components, so React doesn't optimize (#101)

* Integration tests for Graphs in Tabs

Refactored and cleaned-up test

Cast to string to remove 'u' for tests

Cast el.text to string in wait_for_text_to_equal method

Try expected clickData as Python dict and json.dump it

* Add key to rendered components, so React doesn't optimize

* Version bump to 0.16.1

* Added -> Fixed

* Update CHANGELOG.md

Co-Authored-By: valentijnnieman <[email protected]>

Author: valentijnnieman

CHANGELOG.md

@@ -2,6 +2,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.16.1] - 2018-12-14
+### Fixed
+- Added `key` to rendered components, fixing [#379](https://github.com/plotly/dash-core-components/issues/379)
+
 ## [0.16.0] - 2018-12-07
 ### Added
 - [Redux devtools](https://github.com/zalmoxisus/redux-devtools-extension) support [#107](https://github.com/plotly/dash-renderer/pull/107)