chore(release): 7.0.4 [skip ci]

## [7.0.4](https://github.com/react-native-community/react-native-webview/compare/v7.0.3...v7.0.4) (2019-09-05)

### Bug Fixes

* **iOS:** use RCTConvert to convert allowingReadAccessToURL. ([#845](https://github.com/react-native-community/react-native-webview/issues/845)) ([c366fdf](https://github.com/react-native-community/react-native-webview/commit/c366fdf))

package.json

     "Thibault Malbranche <malbranche.thibault@gmail.com>"
   ],
   "license": "MIT",
-  "version": "7.0.3",
+  "version": "7.0.4",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
     "ci": "CI=true && yarn lint && yarn test",