Update deps and travis

[nakamorichi]

No description provided.

[nakamorichi]

@simonguest @briananderson1222 I fixed some issues caused by deprecations.

[briananderson1222]

is this needed as both a dev dependency and peer dependency?

[nakamorichi]

Yes. Peer dependency tells for the library consumer that he should provide such dependency. Dev dependencies are not installed when you npm install a package. The reason why there may not have been problem often in this case is probably because the library consumer already has added mongoose dependency. Nevertheless, mongoose is also a production dependency, and in order to avoid weird version mismatch problems between swagger-mongoose and the consuming project, it is best to have it as a peer dependency so that the library consumer can decide the actual version.

http://stackoverflow.com/questions/18875674/whats-the-difference-between-dependencies-devdependencies-and-peerdependencies