Appraisals in micro_sessions-0.3.0 vs Appraisals in micro_sessions-0.4.0

@@ -14,5 +14,13 @@
 end
 
 appraise 'rails-4.1' do
   gem 'rails', '~> 4.1.1'
 end
+
+appraise 'rails-4.2' do
+  gem 'rails', '~> 4.2'
+end
+
+appraise 'rails-5.1' do
+  gem 'rails', '~> 5.1'
+end