Add strict comparison null !== instead of ! (#1794)

Author: jderusse

CHANGELOG.md

@@ -6,6 +6,10 @@
 
 - AWS api-change: This release adds support for Query Insights, a feature that provides details of query execution, enabling users to identify areas for improvement to optimize their queries, resulting in improved query performance and lower query costs.
 
+### Changed
+
+- use strict comparison `null !==` instead of `!`
+
 ## 2.0.4
 
 ### Changed

src/Result/QueryResponse.php

@@ -139,7 +139,7 @@ public function getRows(bool $currentPageOnly = false): iterable
         $page = $this;
         while (true) {
             $page->initialize();
-            if ($page->nextToken) {
+            if (null !== $page->nextToken) {
                 $input->setNextToken($page->nextToken);
 
                 $this->registerPrefetch($nextPage = $client->query($input));