Implement th suffix

Author: Frumentius-Rev

practice-tdd/get-ordinal-number.test.js

@@ -30,3 +30,9 @@ test("should append 'rd' for numbers ending with 3, except those ending with 13"
   expect(getOrdinalNumber(23)).toEqual("23rd");
   expect(getOrdinalNumber(113)).toEqual("113th");
 });
+
+test("should append 'th' for other numbers", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(24)).toEqual("24th");
+  expect(getOrdinalNumber(114)).toEqual("114th");
+});