With PHP 8, it doesn't work at the moment, unfortunately:
composer update --no-dev
Composer is operating significantly slower than normal because you do not have the PHP curl extension enabled.
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.
Problem 1
- phpunit/phpunit[6.0.0, ..., 6.5.14] require php ^7.0 -> your php version (8.1.2) does not satisfy that requirement.
- Root composer.json requires phpunit/phpunit ~6 -> satisfiable by phpunit/phpunit[6.0.0, ..., 6.5.14].
Running update with --no-dev does not mean require-dev is ignored, it just means the packages will not be installed. If dev requirements are blocking the update you have to resolve those problems.
With PHP 8, it doesn't work at the moment, unfortunately:
Thanks in advance.