fix: keep compatability with other changes

index.js

@@ -1,2 +1,13 @@
+import Axios from './lib/core/Axios.js';
+import AxiosHeaders from './lib/core/AxiosHeaders.js';
+import AxiosError from './lib/core/AxiosError.js';
+import CanceledError from './lib/cancel/CanceledError.js';
 import axios from './lib/axios.js';
-export default axios;
+
+export {
+  axios as default,
+  Axios,
+  AxiosHeaders,
+  AxiosError,
+  CanceledError,
+};