rumale.gemspec in rumale-0.10.0 vs rumale.gemspec in rumale-0.11.0

- old
+ new

@@ -37,7 +37,8 @@
 
   spec.add_development_dependency 'bundler', '>= 1.16'
   spec.add_development_dependency 'coveralls', '~> 0.8'
   spec.add_development_dependency 'rake', '~> 12.0'
   spec.add_development_dependency 'rake-compiler'
+  spec.add_development_dependency 'parallel'
   spec.add_development_dependency 'rspec', '~> 3.0'
 end