Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires psr/simple-cache ^3.0.0 -> satisfiable by psr/simple-cache[3.0.0].
- psr/simple-cache 3.0.0 requires php >=8.0.0 -> your php version (7.3.33) does not satisfy that requirement.
Problem 2
- laravel/lumen v8.1.2 requires laravel/lumen-framework ^8.3.1 -> satisfiable by laravel/lumen-framework[v8.3.1, v8.3.2, v8.3.3, v8.3.4].
- laravel/lumen[v8.0.0, ..., v8.1.1] require laravel/lumen-framework ^8.0 -> satisfiable by laravel/lumen-framework[v8.0.0, ..., v8.3.4].
- laravel/lumen-framework[v8.3.0, ..., v8.3.4] require illuminate/contracts ^8.65 -> satisfiable by illuminate/contracts[v8.65.0, ..., v8.83.27].
- laravel/lumen-framework[v8.0.0, ..., v8.2.8] require illuminate/contracts ^8.0 -> satisfiable by illuminate/contracts[v8.0.0, ..., v8.83.27].
- illuminate/contracts[v8.0.0, ..., v8.83.27] require psr/simple-cache ^1.0 -> found psr/simple-cache[1.0.0, 1.0.1] but it conflicts with your root composer.json require (^3.0.0).
- Root composer.json requires laravel/lumen ^8.0 -> satisfiable by laravel/lumen[v8.0.0, v8.1.0, v8.1.1, v8.1.2].