Rakefile in mize-0.6.0 vs Rakefile in mize-0.6.1

@@ -23,9 +23,10 @@
   development_dependency 'rake'
   development_dependency 'simplecov'
   development_dependency 'rspec'
   development_dependency 'yard'
   development_dependency 'all_images'
+  development_dependency 'debug'
 
   required_ruby_version '>= 2'
 end
 
 task :default => :spec