Update todomvc example to new Redux 3.1.0 API

Author: zalmoxisus

examples/todomvc/package.json

@@ -21,7 +21,7 @@
     "react": "^0.14.0",
     "react-dom": "^0.14.0",
     "react-redux": "^4.0.0",
-    "redux": "^3.0.0"
+    "redux": "^3.1.5"
   },
   "devDependencies": {
     "babel-core": "^6.3.15",

examples/todomvc/store/configureStore.js

@@ -2,7 +2,9 @@ import { createStore } from 'redux';
 import rootReducer from '../reducers';
 
 export default function configureStore(initialState) {
-  const store = (window.devToolsExtension ? window.devToolsExtension()(createStore) : createStore)(rootReducer, initialState);
+  const store = createStore(rootReducer, initialState,
+    window.devToolsExtension ? window.devToolsExtension() : undefined
+  );
 
   if (module.hot) {
     // Enable Webpack hot module replacement for reducers