Modify createError and enhanceError functions to accept response as parameter

lib/core/createError.js

@@ -3,14 +3,15 @@
 var enhanceError = require('./enhanceError');
 
 /**
- * Create an Error with the specified message, config, and optional error code.
+ * Create an Error with the specified message, config, error code, and response.
  *
  * @param {string} message The error message.
- * @param {Object} config The config object.
+ * @param {Object} config The config.
  * @param {string} [code] The error code (for example, 'ECONNABORTED').
+ @ @param {Object} [response] The response.
  * @returns {Error} The created error.
  */
-module.exports = function createError(message, config, code) {
+module.exports = function createError(message, config, code, response) {
   var error = new Error(message);
-  return enhanceError(error, config, code);
+  return enhanceError(error, config, code, response);
 };

lib/core/enhanceError.js

@@ -1,17 +1,19 @@
 'use strict';
 
 /**
- * Update an Error with the specified config and optional error code.
+ * Update an Error with the specified config, error code, and response.
  *
  * @param {Error} error The error to update.
- * @param {Object} config The config object.
+ * @param {Object} config The config.
  * @param {string} [code] The error code (for example, 'ECONNABORTED').
+ @ @param {Object} [response] The response.
  * @returns {Error} The error.
  */
-module.exports = function enhanceError(error, config, code) {
+module.exports = function enhanceError(error, config, code, response) {
   error.config = config;
   if (code) {
     error.code = code;
   }
+  error.response = response;
   return error;
 };

lib/core/settle.js

@@ -15,8 +15,11 @@ module.exports = function settle(resolve, reject, response) {
   if (!response.status || !validateStatus || validateStatus(response.status)) {
     resolve(response);
   } else {
-    var error = createError('Request failed with status code ' + response.status, response.config);
-    error.response = response;
-    reject(error);
+    reject(createError(
+      'Request failed with status code ' + response.status,
+      response.config,
+      null,
+      response
+    ));
   }
 };