Demonstration that conflicts don't make composer convenient.
First run:
$ composer install
Then
$ composer require typo3/cms-about
Using version ^9.5 for typo3/cms-about
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- typo3/cms-about v9.5.5 requires typo3/cms-core 9.5.5 -> satisfiable by typo3/cms-core[v9.5.5] but these conflict with your requirements or minimum-stability.
- typo3/cms-about v9.5.4 requires typo3/cms-core 9.5.4 -> satisfiable by typo3/cms-core[v9.5.4] but these conflict with your requirements or minimum-stability.
- typo3/cms-about v9.5.3 requires typo3/cms-core 9.5.3 -> satisfiable by typo3/cms-core[v9.5.3] but these conflict with your requirements or minimum-stability.
- typo3/cms-about v9.5.2 requires typo3/cms-core 9.5.2 -> satisfiable by typo3/cms-core[v9.5.2] but these conflict with your requirements or minimum-stability.
- typo3/cms-about v9.5.1 requires typo3/cms-core 9.5.1 -> satisfiable by typo3/cms-core[v9.5.1] but these conflict with your requirements or minimum-stability.
- typo3/cms-about v9.5.0 requires typo3/cms-core 9.5.0 -> satisfiable by typo3/cms-core[v9.5.0] but these conflict with your requirements or minimum-stability.
- Installation request for typo3/cms-about ^9.5 -> satisfiable by typo3/cms-about[v9.5.0, v9.5.1, v9.5.2, v9.5.3, v9.5.4, v9.5.5].
Installation failed, reverting ./composer.json to its original content.