relax nokogiri dependency

Author: scambra

qbxml.gemspec

@@ -18,6 +18,6 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
 
   gem.add_dependency('activesupport', '>= 3.2.9')
-  gem.add_dependency('nokogiri', '~> 1.5.0')
+  gem.add_dependency('nokogiri', '~> 1.5')
   gem.add_dependency('builder', '~> 3.0')
 end