hooray rails5, update dependencies

[jerrygreen]

I'm still using this lib D: I have just updated dependencies It should work just fine

Unfortunately, rails5 requires ruby 2.2.2+ so travis will fail on ruby 1.9.3

[bithavoc]

@JerryGreen would you like to be a maintainer of this gem?

[jerrygreen]

@bithavoc I think more yes than no. But I'm not sure about my responsibilities though :smile:

[bithavoc]

@JerryGreen you will be given collaborator status, can merge stuff and let me know when you need a new release of the gem.

[bithavoc]

@JerryGreen for starters, make sure tests are passing :)

[jerrygreen]

@bithavoc I think we need to get rid of ruby 1.9.3 from ci for master branch

[bithavoc]

@JerryGreen let's do a major version bump then, we follow semver.