Gemfile in image_optim_rails-0.2.0 vs Gemfile in image_optim_rails-0.3.0

@@ -8,5 +8,9 @@
   sprockets-rails
 ].each do |gem_name|
   version = ENV[gem_name.tr('-', '_').upcase + '_VERSION']
   gem gem_name, version if version
 end
+
+if RUBY_VERSION >= '2.0'
+  gem 'travis_check_rubies', '~> 0.2'
+end