laravel 5.8 to 6 upgrade check reports existing projects code example
Example: laravel 7 upgrade
$>which composer
/usr/local/bin/composer
$>php -d memory_limit=512M /usr/local/bin/composer update
...
$>which composer
/usr/local/bin/composer
$>php -d memory_limit=512M /usr/local/bin/composer update
...