当我尝试安装时,出现此错误:
# composer require backpack/base
Using version ^0.7.3 for backpack/base
./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 backpack/base ^0.7.3 -> satisfiable by backpack/base[0.7.3].
- backpack/base 0.7.3 requires laravel/framework 5.3.* -> satisfiable by laravel/framework[5.3.x-dev, v5.3.0, v5.3.0-RC1, v5.3.1, v5.3.10, v5.3.11, v5.3.12, v5.3.13, v5.3.14, v5.3.15, v5.3.16, v5.3.17, v5.3.18, v5.3.19, v5.3.2, v5.3.3, v5.3.4, v5.3.5, v5.3.6, v5.3.7, v5.3.8, v5.3.9] but these conflict with your requirements or minimum-stability.
Installation failed, reverting ./composer.json to its original content.
如何解决?