Updates restify peerDependency

[mehdivk]

Adding support of Restify 3.0.x

[mehdivk]

Current tests are green.

[nguyenchr]

@mehdivk I don't remember if there is a reason we didn't include Restify 3.0.x
@rprieto can you think of any?

also can you add a .travis.yml so we can get the build status

[mehdivk]

@nguyenchr .travis.yml came via another PR. I can see The Travis CI build passed in Merge pull request area

[rprieto]

Nice one 👍 I don't think there was a particular reason apart from the fact v3 didn't exist yet.

Probably just worth testing locally, in case the CORS implementation has changed in Restify (since this module implements preflight, but relies on Restify for actual requests).

[wlkrw]

+1 Before I noticed this pr I was going to make one for relaxing the peer dependency. I tested with restify 3.0.2 for work, it's not on Github. How 'bout them Waratahs

[mehdivk]

@rprieto @nguyenchr @wlkrw
I tried it with Restify 3.0.2 and it works. Moreover last update on cors.js file of Restify codebase was 10 months ago and CORS feature of Restify doesn't depend on other dependencies so I think it's safe to upgrade it.

https://github.com/mcavage/node-restify/blob/master/lib/plugins/cors.js

[rprieto]

Awesome, thanks Mehdi! Let's merge this 🚢