composer require dvizh/yii2-shop "@dev"
./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
Installation request for dvizh/yii2-shop @dev -> satisfiable by dvizh/yii2-shop[dev-master].
dvizh/yii2-shop dev-master requires dvizh/yii2-gallery * -> satisfiable by dvizh/yii2-gallery[dev-master] but these conflict with your requirements or minimum-stability.
composer require dvizh/yii2-shop "@dev" ./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