fixes deprecated nullable param and a plugin param

Author: jajajaime

Model/Indexer/ProductObserver.php

@@ -64,12 +64,12 @@ public function afterDelete(ProductResource $productResource, ProductResource $r
 
     /**
      * @param Action $subject
-     * @param Action|null $result
+     * @param Action $result
      * @param array $productIds
      *
      * @return Action
      */
-    public function afterUpdateAttributes(Action $subject, ?Action $result = null, $productIds)
+    public function afterUpdateAttributes(Action $subject, Action $result, $productIds)
     {
         if (!$this->indexer->isScheduled()) {
             $this->indexer->reindexList(array_unique($productIds));
@@ -80,12 +80,12 @@ public function afterUpdateAttributes(Action $subject, ?Action $result = null, $
 
     /**
      * @param Action $subject
-     * @param Action|null $result
+     * @param Action $result
      * @param array $productIds
      *
      * @return mixed
      */
-    public function afterUpdateWebsites(Action $subject, ?Action $result = null, array $productIds)
+    public function afterUpdateWebsites(Action $subject, Action $result, array $productIds)
     {
         if (!$this->indexer->isScheduled()) {
             $this->indexer->reindexList(array_unique($productIds));

Service/AlgoliaConnector.php

@@ -628,7 +628,7 @@ public function copyQueryRules(IndexOptionsInterface $fromIndexOptions, IndexOpt
      * @throws AlgoliaException
      * @throws NoSuchEntityException
      */
-    public function searchRules(IndexOptionsInterface $indexOptions, array$searchRulesParams = null)
+    public function searchRules(IndexOptionsInterface $indexOptions, ?array $searchRulesParams = null)
     {
         $indexName = $indexOptions->getIndexName();