update dependencies

[jonathanong]

you are using very old versions of the dependencies

[mizzao]

The develop branch is what is actually being used right now - I don't think anyone uses the master branch. Also, I'm just using this as a stop-gap solution until someone comes up with a better Node MTurk API. It's pretty messy.

[JoseBarrios]

Hey guys, since you're looking to join/use a better Node MTurk API, check my project out:

https://github.com/JoseBarrios/mturk-api

The main file is less than 130 lines of code, and the API supports all operations. I built it with maintainability in mind. Hope you like it!

[mizzao]

Yep, I used to maintain this, but have switched over my project (https://github.com/TurkServer/turkserver-meteor) to use @JoseBarrios' API a while ago. Can confirm it works great!