Per composer, MediaWiki core uses jakub-onderka/php-parallel-lint (https://packagist.org/packages/jakub-onderka/php-parallel-lint) package which has been abandoned and no longer maintained, use php-parallel-lint/php-parallel-lint (https://packagist.org/packages/php-parallel-lint/php-parallel-lint) package instead.
Package jakub-onderka/php-parallel-lint is abandoned, you should avoid using it. Use php-parallel-lint/php-parallel-lint instead.
Should we possibly update MediaWiki vendor and migrate the requirement in composer.json in core?