How is this different than `suncalc`?

[IonicaBizau]

I'm seeing quite a bit of difference compared with suncalc.

> (require("suncalc")).getTimes(new Date(2017, 11, 15, 12), 46.19, 21.32).sunset
2017-12-15T14:50:31.382Z
> new (require("solar-calc"))(new Date(2017, 11, 15, 12), 46.19, 21.32).sunset
2017-12-15T14:49:11.000Z

Now, the obvious answer would be to check out the code. But I'm lost in all those computations. 😂

Thanks for the great work, @jonhester! 👍