Egg Redis Typescript Error.

egg-redis/index.d.ts
----------------------
```
import { Redis, RedisOptions } from "ioredis";

interface ClusterOptions extends RedisOptions {
cluster?: boolean;
nodes?: RedisOptions[];
}

interface EggRedisOptions {
Redis?: Redis;
default?: object;
app?: boolean;
agent?: boolean;
client?: ClusterOptions;
clients?: Record;
}

declare module 'egg' {
interface Application {
redis: Redis & Singleton;
}

interface EggAppConfig {
redis: EggRedisOptions;
}
}

```
This code does not resolved Instance Singleton correctly due to collision of property `get()`. Please consider
```
import {Singleton} from "egg";
```
on the top of this declaration. And/Or reverse the type
```
interface Application {
redis: Singleton & Redis;
}
```