gtag.js

[schnoggo]

We've got some users of WordPress plugin with issues.
Looks like it's the new gtag.js.
It implements a dataLayer, but seems to have it's own methods for pushing events.
gtag('event','GAEvent',{'event_category':'cat', 'event_label': 'death', 'event_action':'jackson'});
So I think we need to split the test for GTM into two flavors so we can differentiate between GTM and gtag.
I probably won't get a chance to really test a patch until after Thanksgiving, so I wanted to let you know.