Reduce snowplow delay before unloading a page

app/assets/javascripts/tracking.js

@@ -12,6 +12,7 @@ const DEFAULT_SNOWPLOW_OPTIONS = {
   contexts: { webPage: true, performanceTiming: true },
   formTracking: false,
   linkClickTracking: false,
+  pageUnloadTimer: 10,
 };
 
 const createEventPayload = (el, { suffix = '' } = {}) => {

spec/frontend/tracking_spec.js

@@ -31,6 +31,7 @@ describe('Tracking', () => {
         contexts: { webPage: true, performanceTiming: true },
         formTracking: false,
         linkClickTracking: false,
+        pageUnloadTimer: 10,
       });
     });
   });