webstorage.utility set should give a way to handle the error

[Jiehong]

Hello,

Currently, in webstorage.utility.ts, we have the following function:

public set<T>(key: string, value: T, config: DecoratorConfig = {}): T {

However, in its definition, we can see that it's only calling console.log upon failure.
This behaviour does not allow clients to detect and react in case of error.

Perhaps this function should instead return an Observable<T> or provide a callback in case of error instead.