add: 验证回文字符串 Ⅱ

test/string/valid-palindrome-ii.test.js

@@ -0,0 +1,8 @@
+import { validPalindrome } from '../../src/string/valid-palindrome-ii'
+
+test('验证回文字符串 Ⅱ', () => {
+  expect(validPalindrome('aba')).toBe(true)
+  expect(validPalindrome('abba')).toBe(true)
+  expect(validPalindrome('abca')).toBe(true)
+  expect(validPalindrome('abcda')).toBe(false)
+})