Moving settle & transformData from helpers/ -> core/

lib/core/transformData.js

@@ -0,0 +1,20 @@
+'use strict';
+
+var utils = require('./../utils');
+
+/**
+ * Transform the data for a request or a response
+ *
+ * @param {Object|String} data The data to be transformed
+ * @param {Array} headers The headers for the request or response
+ * @param {Array|Function} fns A single function or Array of functions
+ * @returns {*} The resulting transformed data
+ */
+module.exports = function transformData(data, headers, fns) {
+  /*eslint no-param-reassign:0*/
+  utils.forEach(fns, function transform(fn) {
+    data = fn(data, headers);
+  });
+
+  return data;
+};