chore(release): 4.0.0 [skip ci]

# [4.0.0](https://github.com/react-native-community/react-native-webview/compare/v3.2.2...v4.0.0) (2019-01-30)

### Features

* **iOS/Android:** Add `cacheEnabled` prop ([#152](https://github.com/react-native-community/react-native-webview/issues/152)) ([83ce79f](https://github.com/react-native-community/react-native-webview/commit/83ce79f))

### BREAKING CHANGES

* **iOS/Android:** This change makes caching enabled by default when previously there was no caching behavior which may cause unexpected behaviour changes in your existing implementations.

package.json

@@ -8,7 +8,7 @@
     "Thibault Malbranche <malbranche.thibault@gmail.com>"
   ],
   "license": "MIT",
-  "version": "3.2.2",
+  "version": "4.0.0",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
     "test:ios:flow": "flow check",