chore(release): 5.4.0 [skip ci]

# [5.4.0](https://github.com/react-native-community/react-native-webview/compare/v5.3.1...v5.4.0) (2019-03-20)

### Features

* **typescript:** Source code rewrite using typescript ([#425](https://github.com/react-native-community/react-native-webview/issues/425)) ([453b7dd](https://github.com/react-native-community/react-native-webview/commit/453b7dd)), closes [#384](https://github.com/react-native-community/react-native-webview/issues/384) [#435](https://github.com/react-native-community/react-native-webview/issues/435) [#206](https://github.com/react-native-community/react-native-webview/issues/206) [#171](https://github.com/react-native-community/react-native-webview/issues/171) [#168](https://github.com/react-native-community/react-native-webview/issues/168)

package.json

@@ -8,7 +8,7 @@
     "Thibault Malbranche <malbranche.thibault@gmail.com>"
   ],
   "license": "MIT",
-  "version": "5.3.1",
+  "version": "5.4.0",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
     "ci": "CI=true && yarn lint && yarn test",