Want suggestions on my npm package

I created a npm package for in-memory cache. Kind of node-cache alternative.

I added :

1. General cache
2. LRU cache
3. Tag cache

You can keep backup of the cache in disk (encrypted or non encrypted).

https://www.npmjs.com/package/flexi-cache-node

I want your suggestions on the package. What other functionalities you want to add or any other improvements.

Thanks.