Issue434 - Clear date in DatePickerSingle and DatePickerRange (#435)

Author: Marc-Andre-Rivet

Diff for: CHANGELOG.md

@@ -5,6 +5,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ## Unreleased
 ### Fixed
 - Fix dynamically disabling and enabling `Interval` components [#436](https://github.com/plotly/dash-core-components/pull/436)
+- Clear date in DatePickerSingle and DatePickerRange [#434](https://github.com/plotly/dash-core-components/issues/434)
 
 ## [0.42.1] - 2019-01-07
 ### Fixed