Ability to pretty print json output

[josegonzalez]

I've been using this library for a side-project and it's super great! One thing I've noticed that I'd love to see if it's possible would be to pretty-print the json output. I realize this would add a bit of overhead but it's not a huge concern for my particular use case.

If someone could point me towards how to enable this, that would be dope. Thanks in advance!