rouge.gemspec in rouge-2.2.1 vs rouge.gemspec in rouge-3.0.0

- old
+ new

@@ -13,6 +13,7 @@
   s.homepage = "http://rouge.jneen.net/"
   s.rubyforge_project = "rouge"
   s.files = Dir['Gemfile', 'LICENSE', 'rouge.gemspec', 'lib/**/*.rb', 'lib/**/*.yml', 'bin/rougify', 'lib/rouge/demos/*']
   s.executables = %w(rougify)
   s.licenses = ['MIT', 'BSD-2-Clause']
+  s.required_ruby_version = '>= 2.0'
 end