Your requirements could not be resolved to an installable set of packages.
Problem 1
- laravel-lang/native-locale-names 1.2.0 requires laravel-lang/locales ^1.6 -> satisfiable by laravel-lang/locales[1.6.0, 1.x-dev] from composer repo (https://repo.packagist.org) but laravel-lang/locales is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.
- laravel-lang/native-locale-names 1.2.1 requires laravel-lang/locales ^1.0 -> satisfiable by laravel-lang/locales[1.0.0, ..., 1.x-dev] from composer repo (https://repo.packagist.org) but laravel-lang/locales is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.
- Root composer.json requires laravel-lang/native-locale-names ^1.2 -> satisfiable by laravel-lang/native-locale-names[1.2.0, 1.2.1].