[BUGFIX] Show response content from packagist instead of "Array"

assets/hooks/change-merged.d/update-packagist.org.phpsh

@@ -43,7 +43,7 @@ if ($result === 0 && !empty($composerJson)) {
 
             exec($url, $result);
 
-            echo PHP_EOL . 'Update ' . $composerJson->name . ' on packagist.org returned: ' . $result . PHP_EOL;
+            echo PHP_EOL . 'Update ' . $composerJson->name . ' on packagist.org returned: ' . var_export($result, true) . PHP_EOL;
         }
     }
 }