Make Google Analytics support correct types for _gaq.push() (#35962)

It seems that `_gaq.push` can accept not only strings, but boolean
and numbers as well. This commit fixes the types declarations for it
according to the documentation:
https://developers.google.com/analytics/devguides/collection/gajs/methods/gaJSApiEventTracking#_trackevent

types/google.analytics/google.analytics-tests.ts

@@ -106,6 +106,9 @@ describe("tester Google Analytics Code  _gaq object", () => {
         _gaq.push(['_gat._anonymizeIp']);
         _gaq.push(['_trackPageview']);
 
+        // more details: https://developers.google.com/analytics/devguides/collection/gajs/methods/gaJSApiEventTracking#_trackevent
+        _gaq.push(['_trackEvent', 'category', 'action_name', undefined, undefined, true]);
+
         _gaq.push(() => {
                 const tracker = _gat._getTrackerByName('UA-65432-1');
                 tracker._trackPageview();

types/google.analytics/index.d.ts

@@ -19,7 +19,7 @@ declare class Tracker {
 }
 
 interface GoogleAnalyticsCode {
-    push(commandArray: string[]): void;
+    push(commandArray: Array<string|boolean|number>): void;
     push(func: Function): void;
 }