Update api-js.md (#1274)

Apparently, by looking at [source code](https://github.com/Microsoft/react-native-code-push/blob/6b4354ad8eb4c9ac30d6c6e8dd90dbb369d5a3c7/CodePush.js#L553), the codes numbers have changed. This update simply matches the new numeration

Author: kelset

docs/api-js.md

@@ -477,13 +477,13 @@ codePush.sync({ updateDialog: true },
 
 This method returns a `Promise` which is resolved to a `SyncStatus` code that indicates why the `sync` call succeeded. This code can be one of the following `SyncStatus` values:
 
-* __codePush.SyncStatus.UP_TO_DATE__ *(4)* - The app is up-to-date with the CodePush server.
+* __codePush.SyncStatus.UP_TO_DATE__ *(0)* - The app is up-to-date with the CodePush server.
 
-* __codePush.SyncStatus.UPDATE_IGNORED__ *(5)* - The app had an optional update which the end user chose to ignore. (This is only applicable when the `updateDialog` is used)
+* __codePush.SyncStatus.UPDATE_IGNORED__ *(2)* - The app had an optional update which the end user chose to ignore. (This is only applicable when the `updateDialog` is used)
 
-* __codePush.SyncStatus.UPDATE_INSTALLED__ *(6)* - The update has been installed and will be run either immediately after the `syncStatusChangedCallback` function returns or the next time the app resumes/restarts, depending on the `InstallMode` specified in `SyncOptions`.
+* __codePush.SyncStatus.UPDATE_INSTALLED__ *(1)* - The update has been installed and will be run either immediately after the `syncStatusChangedCallback` function returns or the next time the app resumes/restarts, depending on the `InstallMode` specified in `SyncOptions`.
 
-* __codePush.SyncStatus.SYNC_IN_PROGRESS__ *(7)* - There is an ongoing `sync` operation running which prevents the current call from being executed.
+* __codePush.SyncStatus.SYNC_IN_PROGRESS__ *(4)* - There is an ongoing `sync` operation running which prevents the current call from being executed.
 
 The `sync` method can be called anywhere you'd like to check for an update. That could be in the `componentWillMount` lifecycle event of your root component, the onPress handler of a `<TouchableHighlight>` component, in the callback of a periodic timer, or whatever else makes sense for your needs. Just like the `checkForUpdate` method, it will perform the network request to check for an update in the background, so it won't impact your UI thread and/or JavaScript thread's responsiveness.
 
@@ -559,15 +559,15 @@ This enum specifies when you would like your app to sync with the server for upd
 
 This enum is provided to the `syncStatusChangedCallback` function that can be passed to the `sync` method, in order to hook into the overall update process. It includes the following values:
 
-* __codePush.SyncStatus.CHECKING_FOR_UPDATE__ *(0)* - The CodePush server is being queried for an update.
-* __codePush.SyncStatus.AWAITING_USER_ACTION__ *(1)* - An update is available, and a confirmation dialog was shown to the end user. (This is only applicable when the `updateDialog` is used)
-* __codePush.SyncStatus.DOWNLOADING_PACKAGE__ *(2)* - An available update is being downloaded from the CodePush server.
-* __codePush.SyncStatus.INSTALLING_UPDATE__ *(3)* - An available update was downloaded and is about to be installed.
-* __codePush.SyncStatus.UP_TO_DATE__ *(4)* - The app is fully up-to-date with the configured deployment.
-* __codePush.SyncStatus.UPDATE_IGNORED__ *(5)* - The app has an optional update, which the end user chose to ignore. (This is only applicable when the `updateDialog` is used)
-* __codePush.SyncStatus.UPDATE_INSTALLED__ *(6)* - An available update has been installed and will be run either immediately after the `syncStatusChangedCallback` function returns or the next time the app resumes/restarts, depending on the `InstallMode` specified in `SyncOptions`.
-* __codePush.SyncStatus.SYNC_IN_PROGRESS__ *(7)* - There is an ongoing `sync` operation running which prevents the current call from being executed.
-* __codePush.SyncStatus.UNKNOWN_ERROR__ *(-1)* - The sync operation encountered an unknown error.
+* __codePush.SyncStatus.UP_TO_DATE__ *(0)* - The app is fully up-to-date with the configured deployment.
+* __codePush.SyncStatus.UPDATE_INSTALLED__ *(1)* - An available update has been installed and will be run either immediately after the `syncStatusChangedCallback` function returns or the next time the app resumes/restarts, depending on the `InstallMode` specified in `SyncOptions`.
+* __codePush.SyncStatus.UPDATE_IGNORED__ *(2)* - The app has an optional update, which the end user chose to ignore. (This is only applicable when the `updateDialog` is used)
+* __codePush.SyncStatus.UNKNOWN_ERROR__ *(3)* - The sync operation encountered an unknown error.
+* __codePush.SyncStatus.SYNC_IN_PROGRESS__ *(4)* - There is an ongoing `sync` operation running which prevents the current call from being executed.
+* __codePush.SyncStatus.CHECKING_FOR_UPDATE__ *(5)* - The CodePush server is being queried for an update.
+* __codePush.SyncStatus.AWAITING_USER_ACTION__ *(6)* - An update is available, and a confirmation dialog was shown to the end user. (This is only applicable when the `updateDialog` is used)
+* __codePush.SyncStatus.DOWNLOADING_PACKAGE__ *(7)* - An available update is being downloaded from the CodePush server.
+* __codePush.SyncStatus.INSTALLING_UPDATE__ *(8)* - An available update was downloaded and is about to be installed.
 
 ##### UpdateState