migrate to "export default"

also, set no-use-before-define in linter

src/test/common.js

@@ -1,22 +1,22 @@
 import apps from '../apps.js';
-import * as appstore from '../appstore.js';
-import * as backupSites from '../backupsites.js';
+import appstore from '../appstore.js';
+import backupSites from '../backupsites.js';
 import constants from '../constants.js';
-import * as cron from '../cron.js';
-import * as dashboard from '../dashboard.js';
-import * as database from '../database.js';
-import * as domains from '../domains.js';
+import cron from '../cron.js';
+import dashboard from '../dashboard.js';
+import database from '../database.js';
+import domains from '../domains.js';
 import expect from 'expect.js';
 import fs from 'node:fs';
 import locks from '../locks.js';
-import * as mailer from '../mailer.js';
-import * as mailServer from '../mailserver.js';
+import mailer from '../mailer.js';
+import mailServer from '../mailserver.js';
 import nock from 'nock';
 import path from 'node:path';
-import * as settings from '../settings.js';
+import settings from '../settings.js';
 import tasks from '../tasks.js';
 import timers from 'timers/promises';
-import * as users from '../users.js';
+import users from '../users.js';
 
 const manifest = {
     'id': 'io.cloudron.test',
@@ -168,28 +168,6 @@ const dashboardFqdn = `my.${domain.domain}`;
 const appstoreToken = 'atoken';
 const serverUrl = `http://localhost:${constants.PORT}`;
 
-export {
-    createTree,
-    domainSetup,
-    databaseSetup,
-    setup,
-    cleanup,
-    checkMails,
-    clearMailQueue,
-    getDefaultBackupSite,
-    mockApiServerOrigin,
-    dashboardDomain,
-    dashboardFqdn,
-    app,
-    proxyApp,
-    admin,
-    auditSource,
-    domain, // the domain object,
-    manifest,
-    user,
-    appstoreToken,
-    serverUrl,
-};
 
 function createTree(root, obj) {
     fs.rmSync(root, { recursive: true, force: true });
@@ -272,3 +250,26 @@ async function getDefaultBackupSite() {
     const result = await backupSites.list();
     return result[0];
 }
+
+export default {
+    createTree,
+    domainSetup,
+    databaseSetup,
+    setup,
+    cleanup,
+    checkMails,
+    clearMailQueue,
+    getDefaultBackupSite,
+    mockApiServerOrigin,
+    dashboardDomain,
+    dashboardFqdn,
+    app,
+    proxyApp,
+    admin,
+    auditSource,
+    domain, // the domain object,
+    manifest,
+    user,
+    appstoreToken,
+    serverUrl,
+};