chore(release): 2.12.0 [skip ci]

# [2.12.0](https://github.com/react-native-community/react-native-webview/compare/v2.11.0...v2.12.0) (2018-11-22)

### Features

* **types:** Post message types ([#166](https://github.com/react-native-community/react-native-webview/issues/166)) ([0ff0fd3](https://github.com/react-native-community/react-native-webview/commit/0ff0fd3))

package.json

@@ -8,7 +8,7 @@
     "Thibault Malbranche <malbranche.thibault@gmail.com>"
   ],
   "license": "MIT",
-  "version": "2.11.0",
+  "version": "2.12.0",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
     "test:ios:flow": "flow check",