Update README.md

ios now support WiredHeadset event

Author: zxcpoiu

README.md

@@ -250,7 +250,7 @@ note: ios only supports `auto` currently.
 |  Event      |  android |   ios   |  description |
 |  :---  |   :---:  |  :---:  |     :---    |
 | 'Proximity'   | :smile: | :smile: | proximity sensor detected changes.<br>data: `{'isNear': boolean}` |
-| 'WiredHeadset'| :smile: | :rage:  | fire when wired headset plug/unplug<br>data: `{'isPlugged': boolean, 'hasMic': boolean, 'deviceName': string }` |
+| 'WiredHeadset'| :smile: | :smile:  | fire when wired headset plug/unplug<br>data: `{'isPlugged': boolean, 'hasMic': boolean, 'deviceName': string }` |
 | 'NoisyAudio'  | :smile: | :rage: | see [andriod doc](http://developer.android.com/reference/android/media/AudioManager.html#ACTION_AUDIO_BECOMING_NOISY).<br>data: `null` |
 | 'MediaButton' | :smile: | :rage: | when external device controler pressed button. see [android doc](http://developer.android.com/reference/android/content/Intent.html#ACTION_MEDIA_BUTTON) <br>data: `{'eventText': string, 'eventCode': number }` |
 | 'onAudioFocusChange' | :smile: | :rage: | see [andriod doc](http://developer.android.com/reference/android/media/AudioManager.OnAudioFocusChangeListener.html#onAudioFocusChange(int)) <br>data: `{'eventText': string, 'eventCode': number }` |