W: Deprecation Notice: Class Zend_Validate_Barcode_IntelligentMail located in ./vendor/magento/zendframework1/library/Zend/Validate/Barcode/Intelligentmail.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar:///usr/bin/composer/src/Composer/Autoload/ClassMapGenerator.php:201
Fixes compatibility issues with Composer v2: