Update shoulda

gollum-lib.gemspec

@@ -32,7 +32,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency('RedCloth', '~> 4.2.9')
   s.add_development_dependency('mocha', '~> 0.13.2')
   s.add_development_dependency('org-ruby', '~> 0.8.1')
-  s.add_development_dependency('shoulda', '~> 3.3.2')
+  s.add_development_dependency('shoulda', '~> 3.4.0')
   s.add_development_dependency('wikicloth', '~> 0.8.0')
   s.add_development_dependency('rake', '~> 10.0.3')
   s.add_development_dependency('pry', '~> 0.9.12')