Allow Nokogiri 1.7

Author: matthewd

rails-dom-testing.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = Dir["test/**/*"]
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "nokogiri", "~> 1.6.0"
+  spec.add_dependency "nokogiri", "~> 1.6"
   spec.add_dependency "activesupport",  ">= 4.2.0.beta", "< 5.0"
   spec.add_dependency "rails-deprecated_sanitizer", '>= 1.0.1'