修复游标分页

题目说明

编写 function solution(items, cursor, size)。输入输出均为 JSON 值，不要修改输入数组或对象。不支持外部库、网络访问及异步函数。 items:{id:string,...JSON}[] with unique IDs; cursor:string|null; size:number. Use 10 for a nonpositive/noninteger size and cap at 100. A null cursor starts at the beginning; otherwise start AFTER its matching ID. Unknown cursor yields {items:[],nextCursor:null}. Return the last returned ID as nextCursor only if more items remain. Never mutate input. 输入范围：每个输入数组最多50,000项，每个字符串最多1,000个字符。数字必须有限，整数及整数累计结果在JavaScript安全整数范围内。其他类型和有效性遵循上述规则。

输入输出示例

[
  [
    {
      "id": "a"
    },
    {
      "id": "b"
    },
    {
      "id": "c"
    }
  ],
  null,
  2
]

{
  "items": [
    {
      "id": "a"
    },
    {
      "id": "b"
    }
  ],
  "nextCursor": "b"
}

[
  [
    {
      "id": "a"
    },
    {
      "id": "b"
    }
  ],
  "a",
  1
]

{
  "items": [
    {
      "id": "b"
    }
  ],
  "nextCursor": null
}

[
  [
    {
      "id": "__proto__"
    }
  ],
  null,
  1
]

{
  "items": [
    {
      "id": "__proto__"
    }
  ],
  "nextCursor": null
}