feat(push) add support for version 2.1.0

[dmnkgrc]

This commit adds support for the following methods:

• createChannel
• deleteChannel
• listChannels

Also, I modified the PushEvent definition to allow any string, this because version 2.1.0 also allows to listen to action button callbacks: Action buttons documentation

Finally, I modified the finish() method, so that it can receive the notification id push.finish documentation

[gregavola]

@dmnkgrc I'm seeing finish failure: success callback parameter must be a function, when you apply:

push.finish(data.additionalData.notId). then().catch((err) => console.log(err));

What's the correct docs on how to use this?

[dmnkgrc]

@gregavola I think you must pass a function ti the success callback:
push.finish(data.additionalData.notId). then(() => {}).catch((err) => console.log(err));

[gregavola]

@dmnkgrc has this been tested at all?

[dmnkgrc]

@gregavola Yes, I use this code on my own app

[gregavola]

@dmnkgrc Not sure then - because i tried this:

push.finish(data.additionalData.notId).then(() => {}).catch((err) =>> console.log(err));

and the error:

2017-12-11 08:17:03.046674-0500 XXXX[12131:5047101] finish failure: success callback parameter must be a function

[ihadeed]

This PR has a mistake. The finish method is missing the decorator option: callbackOrder: 'reverse'. Just pushed a commit to fix it.

Please update @ionic-native/push to version 4.5.2. (Publishing now, will be live in ~3 minutes)