Add Optimize code to analytics snippet

Hello Daan,

Thanks for your great plugin. Nice work!

I would like to opt for an option to add the Google Optimize code ga('require', 'GTM-XXXXXX'); to the analytics code snippet, like so:

<script>
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

  ga('create', 'UA-XXXXXXX-X', 'auto');
  ga('require', 'GTM-XXXXXX');
  ga('send', 'pageview');

</script>

Read more on how to deploy Optimize on this Optimize Help page.

With the recently released free version of Google Optimize, I think you have a substantial user base that would like to have this option.

Regards, Henk