Appraisals in activeforce-3.1.0 vs Appraisals in activeforce-4.0.0

@@ -1,19 +1,15 @@
-appraise "4.0" do
-  gem "rails", "~> 4.0.0"
-end
-
-appraise "4.1" do
-  gem "rails", "~> 4.1.0"
-end
-
 appraise "4.2" do
   gem "rails", "~> 4.2.0"
 end
 
 appraise "5.0" do
   gem "rails", "~> 5.0.0"
 end
 
 appraise "5.2" do
   gem "rails", "~> 5.2.0"
+end
+
+appraise "6.0" do
+  gem "rails", "~> 6.0.0.rc1"
 end