add: 定长子串中元音的最大数目

test/string/maximum-number-of-vowels-in-a-substring-of-given-length.test.js

@@ -0,0 +1,6 @@
+import { maxVowels } from '../../src/string/maximum-number-of-vowels-in-a-substring-of-given-length'
+
+test('定长子串中元音的最大数目', () => {
+  expect(maxVowels('abciiidef', 3)).toBe(3)
+  expect(maxVowels('rhythms', 4)).toBe(0)
+})