Function retry

retry(promise, count?, delay?): Promise<unknown>
Promise 重试
Parameters
- promise: Promise<any>
  promise
- count: number = 0
  次数
- delay: number = 0
  延迟时间
Returns Promise<unknown>
Example
```
retry(() => Promise.reject(new Error('error')), 3); /// Promise.reject(new Error('error')) 执行 3 次
```