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Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v3.0.0, ..., v3.0.7] require laravel/framework 5.0.* -> found laravel/framework[v5.0.0, ..., v5.0.35] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.1.0, ..., v3.1.3] require laravel/framework ~5.1.0 -> found laravel/framework[v5.1.0, ..., v5.1.46] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.1.4, ..., v3.1.6] require laravel/framework ~5.1.11 -> found laravel/framework[v5.1.11, ..., v5.1.46] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.1.7, ..., v3.1.10] require laravel/framework ~5.1.27 -> found laravel/framework[v5.1.27, ..., v5.1.46] but it conflicts with your root composer.json require (5.5). - orchestra/testbench v3.2.0 requires laravel/framework ~5.2.0 -> found laravel/framework[v5.2.0, ..., v5.2.45] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.2.1, ..., v3.2.2] require laravel/framework ~5.2.7 -> found laravel/framework[v5.2.7, ..., v5.2.45] but it conflicts with your root composer.json require (5.5). - orchestra/testbench v3.2.3 requires laravel/framework ~5.2.15 -> found laravel/framework[v5.2.15, ..., v5.2.45] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.2.4, ..., v3.2.8] require laravel/framework ~5.2.28 -> found laravel/framework[v5.2.28, ..., v5.2.45] but it conflicts with your root composer.json require (5.5). - orchestra/testbench v3.3.0 requires laravel/framework ~5.3.0 -> found laravel/framework[v5.3.0, ..., v5.3.31] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.3.1, ..., v3.3.3] require laravel/framework ~5.3.3 -> found laravel/framework[v5.3.3, ..., v5.3.31] but it conflicts with your root composer.json require (5.5). - orchestra/testbench v3.3.4 requires laravel/framework ~5.3.11 -> found laravel/framework[v5.3.11, ..., v5.3.31] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.3.5, ..., v3.3.7] require laravel/framework ~5.3.29 -> found laravel/framework[v5.3.29, v5.3.30, v5.3.31] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.4.0, ..., v3.4.5] require laravel/framework ~5.4.0 -> found laravel/framework[v5.4.0, ..., v5.4.36] but it conflicts with your root composer.json require (5.5). - orchestra/testbench v3.4.6 requires laravel/framework ~5.4.15 -> found laravel/framework[v5.4.15, ..., v5.4.36] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.4.7, ..., v3.4.10] require laravel/framework ~5.4.17 -> found laravel/framework[v5.4.17, ..., v5.4.36] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.4.11, ..., v3.4.12] require laravel/framework ~5.4.36 -> found laravel/framework[v5.4.36] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.5.0, ..., v3.5.2] require phpunit/phpunit ~6.0 -> found phpunit/phpunit[6.0.0, ..., 6.5.14] but it conflicts with your root composer.json require (^9.5.20|^10.5). - orchestra/testbench v3.5.3 requires laravel/framework ~5.5.20 -> found laravel/framework[v5.5.20, ..., v5.5.50] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.5.4, ..., v3.5.6] require laravel/framework ~5.5.34 -> found laravel/framework[v5.5.34, ..., v5.5.50] but it conflicts with your root composer.json require (5.5). - orchestra/testbench v3.6.0 requires laravel/framework ~5.6.0 -> found laravel/framework[v5.6.0, ..., v5.6.40] but it conflicts with your root composer.json require (5.5). - orchestra/testbench[v3.6.1, ..., v3.6.2] require laravel/framework ~5.6.4 -> found laravel/framework[v5.6.4, ..., v5.6.40] but it conflicts with your root composer.json require (5.5). - orchestra/testbench v3.6.3 requires laravel/framework ~5.6.5 -> found laravel/framewor