TypeScript error when using Redis.Cluster from ioredis

Prerequisites

[X] I have written a descriptive issue title
[X] I have searched existing issues to ensure the bug has not already been reported

Fastify version

4.3.0

Plugin version

6.0.0

Node.js version

16.14.0

Operating system

macOS

Operating system version (i.e. 20.04, 11.3, 10)

12.5

Description

Let's say we're using an existing Redis.Cluster client we get the following TypeScript error

    Type 'Redis | Cluster' is not assignable to type 'Redis'.
      Type 'Cluster' is not assignable to type 'Redis'.

Steps to Reproduce

import fastifyRedis from "@fastify/redis";
import fastify from "fastify";
import Redis from "ioredis";

const instance = fastify();

const client = new Redis.Cluster([{ host: REDIS_HOST, port: REDIS_PORT }], {
  redisOptions: { password: REDIS_PASSWORD },
});

instance.register(fastifyRedis, {
  client,
  closeClient: true,
});

Expected Behavior

I believe changing this signature to client: Redis | Cluster would fix this issue.

fastify / fastify-redis

TypeScript error when using Redis.Cluster from ioredis #162