MESH.gemspec in mesh-medical-subject-headings-2.0.6 vs MESH.gemspec in mesh-medical-subject-headings-2.1.0

- old
+ new

@@ -22,6 +22,7 @@
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'mocha'
   spec.add_development_dependency 'yard'
   spec.add_development_dependency 'minitest', '~> 5.0.8'
   spec.add_development_dependency 'ruby-prof'
+  spec.add_development_dependency 'nokogiri'
 end