The job was canceled because "_8_3_10_0_lowest" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laravel-lang/locale-list ^1.2, found laravel-lang/locale-list[1.2-RC1, 1.2-rc.2, 1.x-dev] but it does not match your minimum-stability.