DX: apply rector rulesets up to PHP 73

src/Bundle/ChillPersonBundle/Tests/Controller/RelationshipApiControllerTest.php

@@ -136,7 +136,7 @@ final class RelationshipApiControllerTest extends WebTestCase
                 'toPerson' => ['id' => $toPersonId, 'type' => 'person'],
                 'relation' => ['id' => $relationId, 'type' => 'relation'],
                 'reverse' => $isReverse,
-            ])
+            ], JSON_THROW_ON_ERROR)
         );
 
         $response = $this->client->getResponse();