Update ApplicationInstance#visit to use followRedirects()

The current implementation of `Transition#followRedirects()` is identical to the logic here: it catches rejections, and then checks for any other `activeTransition`. Therefore, this commit introduces no change in behavior.

But, if/when emberjs/router.js#335 lands, it will means we can take advantage of that fix for ApplicationInstance#visit.

Author: davidtaylorhq

packages/@ember/application/instance.ts

@@ -263,11 +263,6 @@ class ApplicationInstance extends EngineInstance {
     let handleTransitionReject = (error: any): unknown => {
       if (error.error && error.error instanceof Error) {
         throw error.error;
-      } else if (error.name === 'TransitionAborted' && router._routerMicrolib.activeTransition) {
-        return router._routerMicrolib.activeTransition.then(
-          handleTransitionResolve,
-          handleTransitionReject
-        );
       } else if (error.name === 'TransitionAborted') {
         throw new Error(error.message);
       } else {
@@ -284,6 +279,7 @@ class ApplicationInstance extends EngineInstance {
     // getURL returns the set url with the rootURL stripped off
     return router
       .handleURL(location.getURL())
+      .followRedirects()
       .then(handleTransitionResolve, handleTransitionReject);
   }