simplestate.rb in simplestate-2.0.3

- old
+ new

@@ -1,7 +1,8 @@
 require "delegate"
 require "simplestate/version"
-require "simplestate/state_holder"
-require "simplestate/state_history"
 require "simplestate/state"
 require "simplestate/null_state"
+require "simplestate/state_list"
+require "simplestate/state_holder"
+require "simplestate/state_history"
 