Bundler could not find compatible versions for gem "rack":
  In Gemfile:
    rails (~> 5.0.0) was resolved to 5.0.0, which depends on
      actioncable (= 5.0.0) was resolved to 5.0.0, which depends on
        actionpack (= 5.0.0) was resolved to 5.0.0, which depends on
          rack (~> 2.0)

    capybara was resolved to 2.7.1, which depends on
      rack (>= 1.0.0)

    sidekiq was resolved to 4.1.3, which depends on
      sinatra (>= 1.4.6, ~> 1.4) was resolved to 1.4.6, which depends on
        rack (~> 1.4)

    sass-rails was resolved to 5.0.6, which depends on
      sprockets (< 4.0, >= 2.8) was resolved to 3.7.0, which depends on
        rack (< 3, > 1)

    devise was resolved to 4.2.0, which depends on
      warden (~> 1.2.3) was resolved to 1.2.6, which depends on
        rack (>= 1.0)

    devise was resolved to 4.2.0, which depends on
      warden (~> 1.2.3) was resolved to 1.2.6, which depends on
        rack (>= 1.0)
Bundler could not find compatible versions for gem "railties":
  In Gemfile:
    coffee-rails was resolved to 4.2.1, which depends on
      railties (< 5.2.x, >= 4.0.0)

    devise was resolved to 4.2.0, which depends on
      railties (< 5.1, >= 4.1.0)

    factory_girl_rails (~> 4.5) was resolved to 4.7.0, which depends on
      railties (>= 3.0.0)

    html5shiv-js-rails was resolved to 3.7.0, which depends on
      railties (< 5.0, ~> 4.0)

    owlcarousel-rails was resolved to 1.1.3.3, which depends on
      jquery-rails was resolved to 4.1.1, which depends on
        railties (>= 4.2.0)

    rails (~> 5.0.0) was resolved to 5.0.0, which depends on
      railties (= 5.0.0)

    devise was resolved to 4.2.0, which depends on
      responders was resolved to 2.2.0, which depends on
        railties (< 5.1, >= 4.2.0)

    rspec-rails was resolved to 3.5.1, which depends on
      railties (>= 3.0)

    sass-rails was resolved to 5.0.6, which depends on
      railties (< 6, >= 4.0.0)