Made 22 problem easier

Author: mattpocock

src/05-function-overloads/22-function-overloads-vs-conditional-types.problem.ts

@@ -5,7 +5,9 @@ import { Equal, Expect } from "../helpers/type-utils";
  * This time, let's try and solve this one
  * with function overloads too!
  */
-export const youSayGoodbyeISayHello = (greeting: "goodbye" | "hello") => {};
+export const youSayGoodbyeISayHello = (greeting: "goodbye" | "hello") => {
+  return greeting === "goodbye" ? "hello" : "goodbye";
+};
 
 it("Should return goodbye when hello is passed in", () => {
   const result = youSayGoodbyeISayHello("hello");