IE11 does not support Array.prototype.includes (#313)

https://caniuse.com/#feat=array-includes

Author: nowells

src/handleAction.js

@@ -26,7 +26,7 @@ export default function handleAction(type, reducer = identity, defaultState) {
 
   return (state = defaultState, action) => {
     const { type: actionType } = action;
-    if (!actionType || !types.includes(toString(actionType))) {
+    if (!actionType || types.indexOf(toString(actionType)) === -1) {
       return state;
     }