jekyll-toc.gemspec in jekyll-toc-0.9.0.beta2 vs jekyll-toc.gemspec in jekyll-toc-0.9.0

@@ -23,6 +23,7 @@
   spec.add_development_dependency 'codeclimate-test-reporter', '~> 1.0'
   spec.add_development_dependency 'jekyll', '>= 3.5'
   spec.add_development_dependency 'minitest', '~> 5.0'
   spec.add_development_dependency 'pry'
   spec.add_development_dependency 'rake'
+  spec.add_development_dependency 'rubocop'
 end