Adapt new bootstrap format, use Asset extender

extensions/akismet/bootstrap.php

@@ -12,7 +12,14 @@
 use Flarum\Akismet\Listener;
 use Illuminate\Contracts\Events\Dispatcher;
 
-return function (Dispatcher $events) {
-    $events->subscribe(Listener\AddClientAssets::class);
-    $events->subscribe(Listener\FilterNewPosts::class);
-};
+return [
+    (new \Flarum\Extend\Assets('forum'))
+        ->asset(__DIR__.'/js/forum/dist/extension.js')
+        ->bootstrapper('flarum/akismet/main'),
+    (new \Flarum\Extend\Assets('admin'))
+        ->asset(__DIR__.'/js/admin/dist/extension.js')
+        ->bootstrapper('flarum/akismet/main'),
+    function (Dispatcher $events) {
+        $events->subscribe(Listener\FilterNewPosts::class);
+    }
+];

extensions/akismet/src/Listener/AddClientAssets.php

@@ -1,43 +0,0 @@
-<?php
-
-/*
- * This file is part of Flarum.
- *
- * (c) Toby Zerner <toby.zerner@gmail.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Flarum\Akismet\Listener;
-
-use Flarum\Frontend\Event\Rendering;
-use Illuminate\Contracts\Events\Dispatcher;
-
-class AddClientAssets
-{
-    /**
-     * @param Dispatcher $events
-     */
-    public function subscribe(Dispatcher $events)
-    {
-        $events->listen(Rendering::class, [$this, 'addAssets']);
-    }
-
-    public function addAssets(Rendering $event)
-    {
-        if ($event->isForum()) {
-            $event->addAssets([
-                __DIR__.'/../../js/forum/dist/extension.js'
-            ]);
-            $event->addBootstrapper('flarum/akismet/main');
-        }
-
-        if ($event->isAdmin()) {
-            $event->addAssets([
-                __DIR__.'/../../js/admin/dist/extension.js'
-            ]);
-            $event->addBootstrapper('flarum/akismet/main');
-        }
-    }
-}