Options to auto-manage special objects like `Date`, `Map` and `Set`

[cyrilletuzi]

As stated in the serialization guide:

In most cases, this library uses indexedDB storage, which allows any value type. But in special cases (like in Firefox / IE private mode, see the browser support guide for details), the library will fall back to localStorage, where JSON serialization will happen.

Everything can be serialized (JSON.stringify()), but when you unserialize (JSON.parse()), you'll only get a JSON, ie. a primitive type, an array or a literal object.

So if you store an instance of a specific class in localStorage, like Date, Map, Set or Blob, what you'll get then with .setItem() won't be a Map, Set or Blob, but just a literal object.

So, it's safer to stick to JSON-compatible values.

The library could add options to manage Date, Map or Set automatically.

It requires:

1. API design,
2. time: I don't have time currently to implement new features, so sponsoring or community PRs are welcomed (after having agreed on the API design)

[cyrilletuzi]

Closing this issue as adding this would complicate the API for a small enhancement. Storing Date, Map and Set is already working for indexedDb (which is 99% of cases), and safely storing them for localStorage is easy and documented.

[cyrilletuzi]

Reopening this issue as it may be allowed by #483