[update] remove usage of const and just export the anonymous function

Author: Sergio Daniel Xalambrí

lib/index.js

@@ -1,10 +1,8 @@
-const catchMiddleware = errorHandler => (store) => next => action => {
+export default errorHandler => (store) => next => action => {
   try {
     return next(action);
   } catch (error) {
     errorHandler(error, store.getState);
     return error;
   }
 };
-
-export default catchMiddleware;