Function fetchToSlow

fetchToSlow(fastestTime): ((func) => any)
@description: 转换请求为慢响应
Parameters
- fastestTime: undefined | number
  
  最快响应时间
Returns ((func) => any)
@example: const data = await fetchToSlow(1000 * 2)(getKgDetail(kg_id));
- - (func): any
  - Parameters
    - func: any
    Returns any