update NEWS.md to track all the potential changes

Author: timelyportfolio

NEWS.md

@@ -1,7 +1,11 @@
 # reactR 0.3.1
 
-* Add `usethis` dependency
+* Update react and react-dom to 16.8.1
+* Add `usethis` R dependency
 * Ignore node_modules in `.Rbuildignore` and `.gitignore`
+* Set `{modules:false}` in `babel_transform` to avoid `"use strict"`; [pull 15](https://github.com/react-R/reactR/pull/15)
+* Use webpack to build `react-tools.js`; [pull 16](https://github.com/react-R/reactR/pull/16)
+* Attach component to the htmlwidget
 
 # reactR 0.3.0