prebid/Prebid.js

## Type of issue
<!-- Is this a bug, feature request, question, etc.? Note if this is a documentation issue, please open a ticket here instead: https://github.com/prebid/prebid.github.io -->

## Description
<!-- Describe the issue -->

## Steps to reproduce
<!--
  If this is a bug, please provide a list of steps to reproduce the issue
-->

## Test page
<!--
Include a link to a test page or minimal demo of the problem via
  https://jsfiddle.net, http://jsbin.com or similar.
-->

### Expected results

### Actual results

## Platform details
<!-- Which versions of Prebid.js, browser / OS, node, npm, etc. -->

## Other information
<!-- References to related issue or PR #s, etc. -->