Prevent infinite recursions when using refsoption as false

[zalmoxisus]

When using new refsoption as false introduced in 8021553, jsan will not handle circular references (as there will be no references to check), so there will be an infinite recursion in those cases. A simple solution is to check if regular JSON.stringify fails and disable that option in that case. It is not the best solution as there could be other exceptions. We could check error message, but it's different in every browser.

I'll keep it open for suggestions and will ship a patch without handling it as refs is new option which won't break any current usage. And anyway it was infinite recursion in recent versions when using reviver.

[zalmoxisus]

Disregard my previous commit, the second one should handle it, and also with circular option.

[kolodny]

Looks good, feel free to merge and release

[zalmoxisus]

Thanks for reviewing!