Fix Rails 5 deprecation warning for to_prepare

Author: holidayworking

lib/devise_security_extension/rails.rb

@@ -3,10 +3,15 @@ class Engine < ::Rails::Engine
     ActiveSupport.on_load(:action_controller) do
       include DeviseSecurityExtension::Controllers::Helpers
     end
-    
-    ActionDispatch::Callbacks.to_prepare do
-      DeviseSecurityExtension::Patches.apply
-    end
 
+    if defined?(ActiveSupport::Reloader)
+      ActiveSupport::Callbacks.to_prepare do
+        DeviseSecurityExtension::Patches.apply
+      end
+    else
+      ActionDispatch::Callbacks.to_prepare do
+        DeviseSecurityExtension::Patches.apply
+      end
+    end
   end
 end