Update date methods to support CarbonImmutable

Author: pdphilip

src/Eloquent/ElasticsearchModel.php

@@ -4,6 +4,7 @@
 
 namespace PDPhilip\Elasticsearch\Eloquent;
 
+use Carbon\CarbonImmutable;
 use DateTimeInterface;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Relations\Relation;
@@ -256,15 +257,15 @@ public function setAttribute($key, $value): mixed
         return parent::setAttribute($key, $value);
     }
 
-    public function fromDateTime(mixed $value): Carbon
+    public function fromDateTime(mixed $value): Carbon|CarbonImmutable
     {
         return parent::asDateTime($value);
     }
 
     /**
      * {@inheritdoc}
      */
-    protected function asDateTime($value): Carbon
+    protected function asDateTime($value): Carbon|CarbonImmutable
     {
         return parent::asDateTime($value);
     }