ssheduardo/redsys-laravel[1.4.0, ..., 1.4.1] require php ^7.2 -> your php version (8.2.3) does not satisfy that requirement.
ssheduardo/redsys-laravel 1.4.2 requires laravel/framework ^6.0|^7.0|^8.0 -> found laravel/framework[v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6, v8.0.0, ..., v8.83.27] but it conflicts with your root composer.json require (^11.0).
ssheduardo/redsys-laravel 1.4.3 requires laravel/framework ^6.0|^7.0|^8.0|^9.0 -> found laravel/framework[v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6, v8.0.0, ..., v8.83.27, v9.0.0, ..., v9.52.16] but it conflicts with your root composer.json require (^11.0).
ssheduardo/redsys-laravel[1.4.4, ..., 1.4.5] require laravel/framework ^6.0|^7.0|^8.0|^9.0|^10.0 -> found laravel/framework[v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6, v8.0.0, ..., v8.83.27, v9.0.0, ..., v9.52.16, v10.0.0, ..., v10.48.10] but it conflicts with your root composer.json require (^11.0).
Problem 1