update Parse.ly tracker to config-free tracker (#417)

Co-authored-by: Keith Bourgoin <keith.bourgoin@gmail.com>

Author: joshuarrrr

integrations/parsely/lib/index.js

@@ -21,7 +21,9 @@ var Parsely = (module.exports = integration('Parsely')
   .option('dynamicTracking', false)
   .option('trackEvents', false)
   .option('inPixelMetadata', false)
-  .tag('<script src="//d1z2jf7jlzjs58.cloudfront.net/p.js">'));
+  .tag(
+    '<script id="parsely-cfg" src="//cdn.parsely.com/keys/{{ apikey }}/p.js">'
+  ));
 
 /**
  * Initialize.
@@ -33,14 +35,6 @@ Parsely.prototype.initialize = function() {
   if (this.options.dynamicTracking) window.PARSELY.autotrack = false;
   var self = this;
 
-  // append the meta tag we need first before JS fires
-  var meta = document.createElement('meta');
-  meta.id = 'parsely-cfg';
-  meta.setAttribute('data-parsely-site', this.options.apiKey);
-  var head = document.getElementsByTagName('head')[0];
-  if (!head) return;
-  head.appendChild(meta);
-
   this.load(function() {
     when(self.loaded, self.ready);
   });

integrations/parsely/test/index.test.js

@@ -55,17 +55,6 @@ describe('Parsely', function() {
       analytics.stub(parsely, 'load');
     });
 
-    it('should create a Parsely meta tag', function() {
-      var isLoaded = function() {
-        return !!filter(document.getElementsByTagName('meta'), isParselyMetaTag)
-          .length;
-      };
-
-      analytics.assert(!isLoaded());
-      parsely.initialize();
-      analytics.assert(isLoaded());
-    });
-
     it('should set window.PARSELY if not already set', function() {
       analytics.assert(window.PARSELY === undefined);
       analytics.initialize();