Fix index swaps tests after v1.18 (#780)

* Make the test more permissive

* Add test for 'rename' field

Author: Strift

tests/Endpoints/IndexTest.php

@@ -262,7 +262,10 @@ public function testSwapIndexes(): void
         $promise = $this->client->swapIndexes([['indexA', 'indexB'], ['indexC', 'indexD']]);
         $response = $this->client->waitForTask($promise['taskUid']);
 
-        self::assertSame([['indexes' => ['indexA', 'indexB']], ['indexes' => ['indexC', 'indexD']]], $response['details']['swaps']);
+        self::assertSame(['indexA', 'indexB'], $response['details']['swaps'][0]['indexes']);
+        self::assertSame(['indexC', 'indexD'], $response['details']['swaps'][1]['indexes']);
+        self::assertFalse($response['details']['swaps'][0]['rename']);
+        self::assertFalse($response['details']['swaps'][1]['rename']);
     }
 
     public function testDeleteTasks(): void