Merge pull request #23772 from chriskrycho/ember-fix-isEvery

Ember: `isEvery` has optional second arg.

types/ember/index.d.ts

@@ -1182,7 +1182,7 @@ declare module 'ember' {
              * argument for all items in the enumerable. This method is often simpler/faster
              * than using a callback.
              */
-            isEvery(key: string, value: any): boolean;
+            isEvery(key: string, value?: any): boolean;
             /**
              * Returns `true` if the passed function returns true for any item in the
              * enumeration.

types/ember/test/ember-tests.ts

@@ -130,6 +130,7 @@ const isHappy = (person: typeof Person3.prototype): boolean => {
 };
 people2.every(isHappy);
 people2.any(isHappy);
+people2.isEvery('isHappy');
 people2.isEvery('isHappy', true);
 people2.isAny('isHappy', 'true');
 people2.isAny('isHappy');