Gemfile in image_optim_rails-0.4.3 vs Gemfile in image_optim_rails-0.5.0

@@ -2,10 +2,6 @@
 
 source 'https://rubygems.org'
 
 gemspec
 
-gem 'appraisal'
-
-if RUBY_VERSION >= '2.0'
-  gem 'travis_check_rubies', '~> 0.2'
-end
+gem 'appraisal', *RUBY_VERSION < '2.3' ? ['< 2.3'] : []