update Appraisals according to the latest changes

ref #1813

Author: dm1try

Appraisals

@@ -1,18 +1,18 @@
 appraise 'rails-3' do
-  gem 'rails', '3.2.19'
+  gem 'rails', '3.2.22.5'
   gem 'rack-cache', '<= 1.2' # Pin as next rack-cache version (1.3) removes Ruby1.9 support
 end
 
 appraise 'rails-4' do
-  gem 'rails', '4.1.6'
+  gem 'rails', '4.2.10'
 end
 
 appraise 'rails-5' do
-  gem 'rails', '5.0.0'
+  gem 'rails', '5.2.1'
 end
 
-appraise 'rack-1.5.2' do
-  gem 'rack', '1.5.2'
+appraise 'rack-1.5.5' do
+  gem 'rack', '1.5.5'
 end
 
 appraise 'rails-edge' do