Make API compatible with AsyncStorage

[K4CZP3R]

Great library!

Only thing I am missing is the API compatibility with AsyncStorage for seamless replace.

For example, Supabase library expects storage object to have the following functions: removeItem, setItem and getItem.

Workaround for now is to create a wrapper function like this:

const wrappedCacheStore = {
  getItem: async (key: string) => {
    return await read(key);
  },
  setItem: async (key: string, value: string) => {
    await write(key, value);
  },
  removeItem: async (key: string) => {
    await remove(key);
  },
};

[gtokman]

That sounds good. I'm happy to accept a PR. You'd have to go into the index.tsx and export that type.