Customerio push notifications tracking.

[ramirobg94]

We have been using Segment with Customerio for a couple of years. In general, all is okay, but there is one pain point: the tracking of push notifications uses a different endpoint, and the integration doesn't cover that.

The URL should be https://track.customer.io/push/events instead of the https://track.customer.io/api/v1/customers/{identifier}/events

I want to contribute to the customer destination by applying the changes needed to forward this event to the right endpoint. First, assume that the "Opened" event is a push notification event or create some mapping property to select what events should go to the push/events endpoint.

Anyone could help me to apply this changes?