chore: 添加 resolve alias (#2131)

* chore: add resolve alias "@" to "./lib"

* chore: fix jest moduleNameMapper

* fix: 修复 yarn.lock 文件

lib/index.js

@@ -1,4 +1,5 @@
 require('dotenv').config();
+require('module-alias/register');
 const config = require('./config');
 const Koa = require('koa');
 const fs = require('fs');