Update Your Analytics Tracking Code to Support Display Advertising

Hi.
To enable demographics and interests reports I have to modify the .js code by adding a line.
https://support.google.com/analytics/answer/2444872

How to add the line: ga(‘require’, ‘displayfeatures’);
between
ga(‘create’, ‘UA-XXXXXX-XX’, ‘example.com’);
and
ga(‘send’, ‘pageview’);

using this plugin?

Thank you.

https://wordpress.org/plugins/google-analytics-for-wordpress/