fix: ensure ESM imports resolve

Author: AxT-Team Bot

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "uapi-sdk-typescript",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

package.json

@@ -1,5 +1,5 @@
 import axios, { AxiosInstance } from 'axios'
-import { UapiError, mapError } from './errors'
+import { UapiError, mapError } from './errors.js'
 
 type Config = { baseURL: string; token?: string; timeout?: number }