Add test for last minute before midnight (it passes)

Author: habohlin

format-clock-edge-cases/timeConverter.test.js

@@ -27,4 +27,7 @@ test("can format exactly midnight", () =>
   assert.equal(formatAs12HourClock("00:00"), "12:00 am"));
 
 test("can format last minute before noon", () =>
-  assert.equal(formatAs12HourClock("11:59"), "11:59 am"));
+  assert.equal(formatAs12HourClock("11:59"), "11:59 am"));
+
+test("can format last minute before midnight", () =>
+  assert.equal(formatAs12HourClock("23:59"), "11:59 pm"));