Fixing issue referencing wrong headers

lib/axios.js

@@ -32,14 +32,15 @@ var axios = module.exports = function axios(options) {
     request.onreadystatechange = function () {
       if (request && request.readyState === 4) {
         // Prepare the response
+        var headers = parseHeaders(request.getAllResponseHeaders());
         var response = {
           data: transformData(
             request.responseText,
-            options.headers,
+            headers,
             options.transformResponse
           ),
           status: request.status,
-          headers: parseHeaders(request.getAllResponseHeaders()),
+          headers: headers,
           config: options
         };