createChannel doesnt support "vibration" option

[panchazo]

I'm submitting a ... (check one with "x")
[X] bug report
[ ] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://forum.ionicframework.com/ or https://ionicworldwide.herokuapp.com/

Current behavior:
createChannel doesnt support the vibration option that is documented at the push cordova plugin repo (https://github.com/phonegap/phonegap-plugin-push/blob/master/docs/API.md#pushnotificationcreatechannel)

Expected behavior:
The implementation should support the vibration and the Channel interface should be declared as follows perhaps:

export interface Channel {
id: string;
description: string;
importance: Priority;
sound?: string;
vibration?: boolean | Array;
}

Steps to reproduce:
Check out the Channel interface located at index.d.ts (https://github.com/ionic-team/ionic-native/blob/master/src/%40ionic-native/plugins/push/index.ts) it lacks the vibration option