Upgrade versioncake to 3.0

Author: jhawthorn

api/solidus_api.gemspec

@@ -18,5 +18,5 @@ Gem::Specification.new do |gem|
 
   gem.add_dependency 'solidus_core', gem.version
   gem.add_dependency 'rabl', ['>= 0.9.4.pre1', '< 0.12.0']
-  gem.add_dependency 'versioncake', '~> 2.5'
+  gem.add_dependency 'versioncake', '~> 3.0'
 end

api/spec/spec_helper.rb

@@ -61,6 +61,11 @@
     Spree::Api::Config[:requires_authentication] = true
   end
 
+  config.include VersionCake::TestHelpers, type: :controller
+  config.before(:each, type: :controller) do
+    set_request_version('', 1)
+  end
+
   config.use_transactional_fixtures = true
 
   config.example_status_persistence_file_path = "./spec/examples.txt"