feat(react) update to React.js 15.3.0

Author: rmosolgo

README.md

@@ -384,3 +384,8 @@ Any subclass of `ExecJSRenderer` may use those hooks (for example, `SprocketsRen
 - [React.rb](http://reactrb.org/): Use Ruby to build reactive user interfaces with React under the covers.[github source code here](https://github.com/zetachang/react.rb).
 - [react-rails-hot-loader](https://github.com/rmosolgo/react-rails-hot-loader) is a simple live-reloader for `react-rails`.
 - [react-rails-benchmark_renderer](https://github.com/pboling/react-rails-benchmark_renderer) adds performance instrumentation to server rendering.
+
+## Development
+
+- Run tests with `rake test` or `appraisal rake test`
+- Update React assets with `rake react:update`

Rakefile

@@ -14,7 +14,7 @@ end
 
 namespace :react do
   desc "Run the JS build process to put files in the gem source"
-  task update: [:build, :copy]
+  task update: [:install, :build, :copy]
 
   desc "Build the JS bundles with Webpack"
   task :build do

VERSIONS.md

@@ -9,7 +9,7 @@ You can control what version of React.js (and JSXTransformer) is used by `react-
 
 | Gem      | React.js |
 |----------|----------|
-| master   | 15.2.1   |
+| master   | 15.3.0   |
 | 1.8.1    | 15.2.1   |
 | 1.8.0    | 15.0.2   |
 | 1.7.2    | 15.0.2   |