Fix error handler utility example in README (#34)

I believe the `errorHandlerUtility` example needs to have both production & local conform to the expected `report` shape to work properly.

Author: trevtrich

README.md

@@ -208,7 +208,7 @@ if (environment === 'production') {
   });
 
 } else {
-  errorHandler = console.error;
+  errorHandler = {report: console.error};
 }
 
 export default errorHandler;