add localstorage/sessionstorage support

[Benjamin-Shengming]

It would be better that dash core components has localstorage or sessionstorage support,
The code is simple however useful.
And it is a better way to share state than hidden div from my view.

here is a quick experiment code:
https://github.com/Benjamin-Shengming/local_storage

[T4rk1n]

This is a great idea, while working on a project, I made a similar a component, I'll take it from here.