add: 除自身以外数组的乘积

test/array/product-of-array-except-self.test.js

@@ -0,0 +1,5 @@
+import { productExceptSelf } from '../../src/array/product-of-array-except-self'
+
+test('除自身以外数组的乘积', () => {
+  expect(productExceptSelf([1, 2, 3, 4])).toEqual([24, 12, 8, 6])
+})