Upgrade babel-plugin-react-transform to v3.x

Summary: babel-plugin-react-transform@3 includes support for HMR on `React.PureComponent`: gaearon/babel-plugin-react-transform#106

Reviewed By: davidaurelio

Differential Revision: D5814322

fbshipit-source-id: 36e83ffa00f9d4ff079665aec1e8341725811a8e

Author: rafeca

babel-preset/package.json

@@ -1,6 +1,6 @@
 {
   "name": "babel-preset-react-native",
-  "version": "3.0.1",
+  "version": "4.0.0",
   "description": "Babel preset for React Native applications",
   "main": "index.js",
   "repository": "https://github.com/facebook/react-native/tree/master/babel-preset",
@@ -16,7 +16,7 @@
   "homepage": "https://github.com/facebook/react-native/tree/master/babel-preset/README.md",
   "dependencies": {
     "babel-plugin-check-es2015-constants": "^6.5.0",
-    "babel-plugin-react-transform": "2.0.2",
+    "babel-plugin-react-transform": "^3.0.0",
     "babel-plugin-syntax-async-functions": "^6.5.0",
     "babel-plugin-syntax-class-properties": "^6.5.0",
     "babel-plugin-syntax-dynamic-import": "^6.18.0",