Send revenue and orderId to Perfect Audience when 'track' is called

Hi there! We at Perfect Audience noticed after a customer request that there is a bug in our analytics.js integration. It appears it was rewritten earlier this year, and `track` no longer forwards properties (including, critically, revenue and orderId information).

This PR ensures revenue and orderId are forwarded to our `track` method when available from the properties object. Tests updated as well. Thanks!