chore(release): 5.7.0 [skip ci]

# [5.7.0](https://github.com/react-native-community/react-native-webview/compare/v5.6.3...v5.7.0) (2019-04-15)

### Features

* **iOS cookies:** implement sharedCookiesEnabled prop for iOS RNCWKWebView ([#175](https://github.com/react-native-community/react-native-webview/issues/175)) ([cdbfc19](https://github.com/react-native-community/react-native-webview/commit/cdbfc19))

package.json

     "Thibault Malbranche <malbranche.thibault@gmail.com>"
   ],
   "license": "MIT",
-  "version": "5.6.3",
+  "version": "5.7.0",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
     "ci": "CI=true && yarn lint && yarn test",