[REFACTOR] [Hacker Rank] Interview Preparation Kit: String Manipulation: Making Anagrams.

* Adjusted the interface to match what hackerrank expects.

Author: sir-gon

src/hackerrank/interview_preparation_kit/string_manipulation/ctci_making_anagrams.js

@@ -19,7 +19,7 @@ function sum(values) {
   );
 }
 
-export function makeAnagram(a, b) {
+function makeAnagram(a, b) {
   const aMap = charToDicMap(a);
   const bMap = charToDicMap(b);
 
@@ -34,3 +34,4 @@ export function makeAnagram(a, b) {
 }
 
 export default { makeAnagram };
+export { makeAnagram };