Unirest is running asynchronously

[grizzlyfute]

Hello,

I have noticed that unirest 0.6.0 is running asynchronously.
The code reproducing is

unirest
  .post ("http://localhost/serverurl")
  .headers ({ 'Content-Type': 'application/x-www-form-urlencoded;' })
  .end ((x) => console.log("OK " + JSON.stringify(x)));
console.log("End");

The excepted output is

OK { json data }
End

But got

End 
OK { json data }

Thanks.