Fix PHPStan errors against Laravel 13 + larastan 3.9

Bump targets for Laravel 13's generic Scope interface and
remove a dead null check that larastan now flags.
- PublishingScope: add @implements Scope<TModel> and switch
  apply() param to Builder<covariant TModel> to match the
  parent signature variance.
- HasDrafts::newRevision: hoist the $updatingModel null guard
  to an early return so $revision is non-null at use site,
  silencing identical.alwaysFalse on the redundant check.

Author: oddvalue

src/Concerns/HasDrafts.php

@@ -117,10 +117,15 @@ protected function newRevision(): void
         }
 
         $updatingModel = $this->fresh();
-        $revision = $updatingModel?->replicate();
+
+        if ($updatingModel === null) {
+            return;
+        }
+
+        $revision = $updatingModel->replicate();
 
         static::saved(function (Model $model) use ($updatingModel, $revision): void {
-            if ($model->isNot($this) || $revision === null || $updatingModel === null) {
+            if ($model->isNot($this)) {
                 return;
             }
 

src/Scopes/PublishingScope.php

@@ -9,6 +9,8 @@
 
 /**
  * @template TModel of Model
+ *
+ * @implements Scope<TModel>
  */
 class PublishingScope implements Scope
 {
@@ -20,7 +22,7 @@ class PublishingScope implements Scope
     protected $extensions = [/*'Publish', 'Unpublish', 'Schedule', */'Published', 'WithDrafts', 'WithoutDrafts', 'OnlyDrafts'];
 
     /**
-     * @param Builder<TModel> $builder
+     * @param Builder<covariant TModel> $builder
      * @param TModel $model
      */
     public function apply(Builder $builder, Model $model): void