gem 'rspec', '~> 3.0', group: %i(development)
gem 'rubocop', '~> 1.0', group: %i(development)
gem 'rubocop-rspec', '~> 2.0', group: %i(development)
gem 'webrick', '>= 0'
gem 'image_size', '~> 3.0.1'
