Appraisals in cached_resource-5.3.0 vs Appraisals in cached_resource-6.0.0

@@ -1,11 +1,28 @@
 appraise "4.2" do
   gem "rails", "~> 4.2.0"
+  # https://stackoverflow.com/questions/60226893/rails-nomethoderror-undefined-method-new-for-bigdecimalclass
+  gem "bigdecimal", "1.3.5"
 end
 
 appraise "5.0" do
   gem "rails", "~> 5.0.0"
 end
 
 appraise "5.1" do
   gem "rails", "~> 5.1.0"
-end
\ No newline at end of file
+end
+
+# requires ruby >= 2.5.0
+appraise "6.0" do
+  gem "rails", "~> 6.0.0"
+end
+
+# requires ruby >= 2.5.0
+appraise "6.1" do
+  gem "rails", "~> 6.1.0"
+end
+
+# requires ruby >= 2.7.0
+appraise "7.0" do
+  gem "rails", "~> 7.0.0"
+end