use the @cloudron/superagent module

src/routes/test/archives-test.js

@@ -9,7 +9,7 @@ const archives = require('../../archives.js'),
     backups = require('../../backups.js'),
     common = require('./common.js'),
     expect = require('expect.js'),
-    superagent = require('../../superagent.js');
+    superagent = require('@cloudron/superagent');
 
 describe('Archives API', function () {
     const { setup, cleanup, serverUrl, owner, auditSource } = common;