Fix gemspec dependencies

[zinovyev]

Hi!

You've tried to solve the issue #15 by putting several dependencies into the Gemfile. But that's a bit broken for now cause you've occasionally left some of them unchanged in your gemspec file.

I suggest you do not to use Gemfile for the project dependencies at all. They will be included there from the gemspec anyway when the bundler will processes the gem.

Take a look at this page in documentation plz: http://bundler.io/v1.16/guides/creating_gem.html That's what I'm talking about:

Gemfile: Used to manage gem dependencies for our library’s development. This file contains a gemspec line meaning that Bundler will include dependencies specified in foodie.gemspec too. It’s best practice to specify all the gems that our library depends on in the gemspec.

[yyenigun]

@zinovyev you are right. Thanks for your contribution.

[zinovyev]

@yyenigun I would suggest to update the rack version too (~> 2.0), if you don't mind: d508c13