Backport | Critical | Unable to handle blank keys in JSON object #28 | to Version 2.0.1

[theheapdump]

@Faleij please backport (#28) the following commit

223ff95

to "json-stream-stringify": "^2.0.1", as we are strictly dependent on 2.0.1 and we cannot upgrade to 3.0.1.

Thanks a lot. I will be really glad if you can do this.