Symfony version(s) affected: 4.3.7

Description
The latest update of Symfony Console 4.3.7 errors when calling an artisan command from a controller in Laravel with the following error message "ErrorException
Use of undefined constant STDOUT - assumed 'STDOUT' (this will throw an Error in a future version of PHP)".

See attached image.

How to reproduce
Windows Server 2016
IIS 10
PHP 7.3.11
Laravel 6.X
Laravel 5.8
Run an artisan command in Laravel from a controller.