Add development dependency on actionview.

Author: tbsmatt

spec/spec_helper.rb

@@ -1,4 +1,5 @@
 $LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
 require 'value_objects'
+require 'action_view'
 
 ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')

value_objects.gemspec

@@ -19,6 +19,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'activerecord', '~> 4.2'
 
+  s.add_development_dependency 'actionview', '~> 4.2'
   s.add_development_dependency 'bundler', '~> 1.11'
   s.add_development_dependency 'rake', '~> 10.0'
   s.add_development_dependency 'rspec', '~> 3.0'