update changelog for 1.42.3

Author: etpinard

CHANGELOG.md

@@ -10,6 +10,16 @@ https://github.com/plotly/plotly.js/compare/vX.Y.Z...master
 where X.Y.Z is the semver of most recent plotly.js release.
 
 
+## [1.42.3] -- 2018-11-06
+
+### Fixed
+- Fix `histogram` binning for typed array inputs (bug introduced in 1.42.0) [#3211]
+- Fix textfont color `restyle` calls for `pie` traces [#3214]
+- Fix textfont color `editType` for `bar` traces [#3214]
+- Fix array `hoverinfo` support for `ohlc` and `candelestick` [#3213]
+- Correctly list `parcats` hoverinfo attributes which does not support array inputs [#3213]
+
+
 ## [1.42.2] -- 2018-11-01
 
 ### Fixed