Merge pull request #72 from abartov/patch-1

Support newer nokogiri as well

Author: satoryu

docx.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |s|
   s.homepage    = 'https://github.com/chrahunt/docx'
   s.files       = Dir["README.md", "LICENSE.md", "lib/**/*.rb"]
 
-  s.add_dependency 'nokogiri', '~> 1.8', '>= 1.8.1'
+  s.add_dependency 'nokogiri', '~> 1.10', '>= 1.10.4'
   s.add_dependency 'rubyzip',  '~> 2.0'
 
   s.add_development_dependency 'rspec', '~> 3.7'