fix dev bundle

Author: MacKentoch

src/app/redux/store/configureStore.dev.js

@@ -32,8 +32,12 @@ const reducer = combineReducers({
 
 export default function configureStore(initialState) {
   const store = createStore(reducer, initialState, enhancer);
-  module.hot.accept('../modules/reducers', () =>
-    store.replaceReducer(require('../modules/reducers').default)
-  );
+  // checks if webpack HMR:
+  if (module.hot) {
+    module.hot.accept('../modules/reducers', () =>
+      store.replaceReducer(require('../modules/reducers').default)
+    );
+  }
+ 
   return store;
 }