migrate to "export default"

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

src/dns/hetzner.js

@@ -2,23 +2,14 @@ import assert from 'node:assert';
 import BoxError from '../boxerror.js';
 import constants from '../constants.js';
 import debugModule from 'debug';
-import * as dig from '../dig.js';
-import * as dns from '../dns.js';
+import dig from '../dig.js';
+import dns from '../dns.js';
 import safe from 'safetydance';
 import superagent from '@cloudron/superagent';
 import waitForDns from './waitfordns.js';
 
 const debug = debugModule('box:dns/hetzner');
 
-export {
-    removePrivateFields,
-    injectPrivateFields,
-    upsert,
-    get,
-    del,
-    wait,
-    verifyDomainConfig
-};
 
 const ENDPOINT = 'https://dns.hetzner.com/api/v1';
 
@@ -259,3 +250,12 @@ async function verifyDomainConfig(domainObject) {
     return credentials;
 }
 
+export default {
+    removePrivateFields,
+    injectPrivateFields,
+    upsert,
+    get,
+    del,
+    wait,
+    verifyDomainConfig
+};