Export ioredis from @keyvhq/redis package

`ioredis` should be exported from the `@keyvhq/redis` package so that we can ensure that we are using the same version of `ioredis` required by this package. On https://github.com/microlinkhq/keyvhq/blob/8712c7b57c3b9614a67182fa14d60c63bb27e936/packages/redis/src/index.js#L7 we are checking if the argument is an `ioredis` Redis instance but that only works if the version is the same.