Patched test case to avoid tie-breaking dependency on floating-point inaccuracies.

homework-3/src/currency.test.js

@@ -147,7 +147,7 @@ describe('the `planTrades` function', () => {
     test('maximizes return on random forecast #4', () => {
       expect(planTrades(
         [
-          [5, 5, 5],
+          [6, 5, 5],
           [4, 5, 6],
           [3, 5, 6],
           [4, 5, 7],