migrate to "export default"

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

src/notifications.js

@@ -1,15 +1,15 @@
 import assert from 'node:assert';
 import AuditSource from './auditsource.js';
 import BoxError from './boxerror.js';
-import * as changelog from './changelog.js';
+import changelog from './changelog.js';
 import constants from './constants.js';
-import * as dashboard from './dashboard.js';
-import * as database from './database.js';
+import dashboard from './dashboard.js';
+import database from './database.js';
 import debugModule from 'debug';
 import eventlog from './eventlog.js';
-import * as mailer from './mailer.js';
+import mailer from './mailer.js';
 import safe from 'safetydance';
-import * as users from './users.js';
+import users from './users.js';
 
 const debug = debugModule('box:notifications');
 
@@ -32,33 +32,6 @@ const TYPE_MANUAL_APP_UPDATE_NEEDED = 'manualAppUpdate';
 const TYPE_DOMAIN_CONFIG_CHECK_FAILED = 'domainConfigCheckFailed';
 const _add = add;
 
-export {
-    get,
-    update,
-    list,
-    del,
-    onEvent,
-    TYPE_CLOUDRON_INSTALLED,
-    TYPE_CLOUDRON_UPDATED,
-    TYPE_CLOUDRON_UPDATE_FAILED,
-    TYPE_CERTIFICATE_RENEWAL_FAILED,
-    TYPE_BACKUP_CONFIG,
-    TYPE_APP_OOM,
-    TYPE_APP_UPDATED,
-    TYPE_BACKUP_FAILED,
-    TYPE_APP_DOWN,
-    TYPE_APP_UP,
-    TYPE_DISK_SPACE,
-    TYPE_MAIL_STATUS,
-    TYPE_REBOOT,
-    TYPE_UPDATE_UBUNTU,
-    TYPE_BOX_UPDATE,
-    TYPE_MANUAL_APP_UPDATE_NEEDED,
-    TYPE_DOMAIN_CONFIG_CHECK_FAILED,
-    pin,
-    unpin,
-    _add,
-};
 
 const NOTIFICATION_FIELDS = [ 'id', 'eventId', 'type', 'title', 'message', 'creationTime', 'acknowledged', 'context' ];
 
@@ -397,3 +370,31 @@ async function onEvent(eventId, action, source, data) {
         return;
     }
 }
+
+export default {
+    get,
+    update,
+    list,
+    del,
+    onEvent,
+    TYPE_CLOUDRON_INSTALLED,
+    TYPE_CLOUDRON_UPDATED,
+    TYPE_CLOUDRON_UPDATE_FAILED,
+    TYPE_CERTIFICATE_RENEWAL_FAILED,
+    TYPE_BACKUP_CONFIG,
+    TYPE_APP_OOM,
+    TYPE_APP_UPDATED,
+    TYPE_BACKUP_FAILED,
+    TYPE_APP_DOWN,
+    TYPE_APP_UP,
+    TYPE_DISK_SPACE,
+    TYPE_MAIL_STATUS,
+    TYPE_REBOOT,
+    TYPE_UPDATE_UBUNTU,
+    TYPE_BOX_UPDATE,
+    TYPE_MANUAL_APP_UPDATE_NEEDED,
+    TYPE_DOMAIN_CONFIG_CHECK_FAILED,
+    pin,
+    unpin,
+    _add,
+};