Test against Rails 5 by default.

Gemfile

@@ -2,17 +2,23 @@ source "https://rubygems.org"
 
 gemspec
 
-gem "rails", "~> 4.2.6"
-gem "omniauth"
+gem "rails", "~> 5.0.0"
+gem "omniauth", "~> 1.3"
+gem "oauth2"
 gem "omniauth-oauth2"
 gem "rdoc"
 
+gem "activemodel-serializers-xml", github: "rails/activemodel-serializers-xml"
+
+gem "rails-controller-testing"
+
+gem "responders", "~> 2.1"
+
 group :test do
   gem "omniauth-facebook"
   gem "omniauth-openid"
   gem "webrat", "0.7.3", require: false
   gem "mocha", "~> 1.1", require: false
-  gem 'test_after_commit', require: false
 end
 
 platforms :jruby do
@@ -25,6 +31,7 @@ platforms :ruby do
   gem "sqlite3"
 end
 
-group :mongoid do
-  gem "mongoid", "~> 5.0"
-end
+# TODO:
+# group :mongoid do
+#   gem "mongoid", "~> 4.0.0"
+# end