Mixpanel Integration

Like the Segment integration, it would be great to be able to integrate using Mixpanel's javascript SDK. [https://docs.mixpanel.com/docs/tracking-methods/sdks/javascript]

This would allow us to track users and events such as upvoting and leaving feedback and allowing for the identify functionality also.

Im voting for this because Segment is expensive, and adds a new layer to our data pipeline, where we could just import events straight into mixpanel.