update changelog

Author: etpinard

Diff for: CHANGELOG.md

@@ -10,6 +10,12 @@ https://github.com/plotly/plotly.js/compare/vX.Y.Z...master
 where X.Y.Z is the semver of most recent plotly.js release.
 
 
+## [1.4.0] -- 2016-01-11
+
+### Fixed
+- Click events work properly after being broken in 1.4.0 [#174]
+
+
 ## [1.4.0] -- 2016-01-11
 
 ### Added