安装失败，失败信息如下
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Continue as root/super user [yes]?
./composer.json has been updated
Running composer update flagrow/upload
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 flagrow/upload * -> satisfiable by flagrow/upload[0.1.0, ..., 0.7.1].
- flagrow/upload[0.1.0, ..., 0.6.0] require flarum/core 0.1.0-beta.6 -> found flarum/core[v0.1.0-beta.6, ..., v0.1.0-beta.16] but it does not match your minimum-stability.
- flagrow/upload[0.7.0, ..., 0.7.1] require flarum/core 0.1.0-beta.8 -> found flarum/core[v0.1.0-beta.8, ..., v0.1.0-beta.16] but it does not match your minimum-stability.
Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.
You can also try re-running composer require with an explicit version constraint, e.g. "composer require flagrow/upload:*" to figure out if any version is installable, or "composer require flagrow/upload:2.1" if you know which you need.
Installation failed, reverting ./composer.json and ./composer.lock to their original content.