[manhtuon@u2-nvme]$ composer require "graham-campbell/digitalocean:^10.1"
./composer.json has been created
Running composer update graham-campbell/digitalocean
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires graham-campbell/digitalocean ^10.1, found graham-campbell/digitalocean[v0.1.0-alpha, ..., v0.5.1-alpha, v1.0.0, v1.1.0, v2.0.0, v2.1.0, v2.2.0, 2.2.x-dev, v3.0.0, ..., 3.2.x-dev, v4.0.0, v4.0.1, 4.0.x-dev, v5.0.0, ..., 5.4.x-dev, v6.0.0, v6.0.1, 6.0.x-dev, v7.0.0, ..., 7.3.x-dev, v8.0.0, ..., 8.4.x-dev, v9.0.0, 9.0.x-dev, v10.0.0, 10.0.x-dev] but it does not match the constraint.
Installation failed, deleting ./composer.json.