The job was canceled because "ubuntu-latest_7_4_5_8_prefer-lowest" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v3.6.7, ..., 3.6.x-dev] require laravel/framework ~5.6.34 -> found laravel/framework[v5.6.34, ..., 5.6.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench v3.7.0 requires laravel/framework ~5.7.0 -> found laravel/framework[v5.7.0, ..., 5.7.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench[v3.7.1, ..., v3.7.5] require laravel/framework ~5.7.4 -> found laravel/framework[v5.7.4, ..., 5.7.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench v3.7.6 requires laravel/framework ~5.7.14 -> found laravel/framework[v5.7.14, ..., 5.7.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench[v3.7.7, ..., 3.7.x-dev] require laravel/framework ~5.7.28 -> found laravel/framework[v5.7.28, v5.7.29, 5.7.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench v3.8.0 requires laravel/framework ~5.8.0 -> found laravel/framework[v5.8.0, ..., 5.8.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench v3.8.1 requires laravel/framework ~5.8.2 -> found laravel/framework[v5.8.2, ..., 5.8.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench v3.8.2 requires laravel/framework ~5.8.3 -> found laravel/framework[v5.8.3, ..., 5.8.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench[v3.8.3, ..., v3.8.4] require laravel/framework ~5.8.19 -> found laravel/framework[v5.8.19, ..., 5.8.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench[v3.8.5, ..., 3.8.x-dev] require laravel/framework ~5.8.35 -> found laravel/framework[v5.8.35, ..., 5.8.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench[v3.9.0, ..., v3.9.1] require laravel/framework ^6.0 -> found laravel/framework[v6.0.0, ..., 6.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench v3.9.2 requires laravel/framework ^6.2 -> found laravel/framework[v6.2.0, ..., 6.x-dev] but it conflicts with your root composer.json require (5.6). - orchestra/testbench[v3.9.3, ..., 3.9.x-dev] require laravel/framework ^6.18.0 -> found laravel/framework[v6.18.0, ..., 6.x-dev] but it conflicts with your root composer.json require (5.6). - Root composer.json requires orchestra/testbench ^3.6.7 -> satisfiable by orchestra/testbench[v3.6.7, ..., 3.9.x-dev].