setup up Travis for Rails 5

- require Rails 5 since Rubygems doesn’t allow us to only require
activemodel-serializers-xml when Rails is version 5
- require Ruby 2.2 since that’s what Rails 5 requires

.travis.yml

@@ -4,10 +4,5 @@ services:
   - mongodb
 
 rvm:
-  - 2.1.5
-  - 2.2.1
-
-env:
-  - "RAILS_VERSION=4.0"
-  - "RAILS_VERSION=4.1"
-  - "RAILS_VERSION=4.2"
+  - 2.2.5
+  - 2.3.1

Gemfile

@@ -7,10 +7,10 @@ platforms :ruby do
 end
 
 platforms :jruby do
-  gem "minitest", ">= 3.0"
-  gem "activerecord-jdbcsqlite3-adapter", ">= 1.3.0.beta2"
+  gem "minitest"
+  gem "activerecord-jdbcsqlite3-adapter"
 end
 
-version = ENV["RAILS_VERSION"] || "4.1"
-
-eval_gemfile File.expand_path("../gemfiles/#{version}.gemfile", __FILE__)
+gem "rails", "> 5.x"
+gem "mongoid", github: "mongodb/mongoid"
+gem "minitest-rails", github: "blowmage/minitest-rails"

draper.gemspec

@@ -17,15 +17,18 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency 'activesupport', '>= 3.0'
-  s.add_dependency 'actionpack', '>= 3.0'
+  s.required_ruby_version = '>= 2.2.2'
+
+  s.add_dependency 'activesupport', '> 5.x'
+  s.add_dependency 'actionpack', '> 5.x'
   s.add_dependency 'request_store', '~> 1.0'
-  s.add_dependency 'activemodel', '>= 3.0'
+  s.add_dependency 'activemodel', '> 5.x'
+  s.add_dependency 'activemodel-serializers-xml'
 
   s.add_development_dependency 'ammeter'
-  s.add_development_dependency 'rake', '>= 0.9.2'
-  s.add_development_dependency 'rspec-rails', '~> 3.2'
-  s.add_development_dependency 'minitest-rails', '>= 1.0'
+  s.add_development_dependency 'rake'
+  s.add_development_dependency 'rspec-rails'
+  s.add_development_dependency 'minitest-rails'
   s.add_development_dependency 'capybara'
   s.add_development_dependency 'active_model_serializers'
 end

gemfiles/4.0.gemfile

@@ -1,3 +0,0 @@
-gem "rails", "~> 4.0.0"
-gem "mongoid", "~> 4.0"
-gem "devise", "~> 3.0.0"

gemfiles/4.1.gemfile

@@ -1,3 +0,0 @@
-gem "rails", "~> 4.1.0"
-gem "mongoid", "~> 4.0"
-gem "devise", "~> 3.2"

gemfiles/4.2.gemfile

@@ -1,3 +0,0 @@
-gem "rails", "~> 4.2.0"
-gem "mongoid", "~> 4.0"
-gem "devise", "~> 3.4"