om/IDidUpdate triggers re-render in om 0.1.4

gistfile1.clj

(ns examples.events.core
  (:require [om.core :as om :include-macros true]
            [om.dom :as dom :include-macros true]))

(enable-console-print!)

(defn ticker [data owner opts]
  (reify
    om/IInitState
    (init-state [_] 
                {:s 0})
    om/IShouldUpdate
    (should-update [this next-props next-state]
                    true)
    om/IWillMount
    (will-mount [_]           
       (om/transact! data :force inc ))
    om/IRender
    (render [_]       
       (dom/button #js {:onClick #(om/transact! data :force inc )}
                   (str "state:" (:s (om/get-state owner)) )))
    om/IDidUpdate
    (did-update [_ _ _ _]         
       (om/set-state! owner :s (inc (:s (om/get-state owner)))))))

(om/root {:force 0} ticker (.-body js/document))