Dependency reference to mountebank github

[methgaard]

Hi. This project has a dependency to mountebanks github instead of its npm package:

"mountebank": "bbyars/mountebank",

How can this be ? This introduces quite a bit of difficulties when working inside a coorporate network since github is blacklisted.

I suggest you reference the npm package instead:

"mountebank": "1.15.0",