Old Lumen version in requirements

[Ryllaz]

While trying to install via Composer I got this error:

Your requirements could not be resolved to an installable set of packages.

Problem 1
- Installation request for laravel/framework (locked at v5.5.28) -> satisfiable by laravel/framework[v5.5.28].
- Conclusion: don't install clarence/lumen-default-routes v1.0.0
- clarence/lumen-default-routes v1.0.1 requires laravel/lumen-framework 5.2.* -> satisfiable by laravel/lumen-framework[5.2.x-dev].
- clarence/lumen-default-routes v1.0.2 requires laravel/lumen-framework 5.2.* -> satisfiable by laravel/lumen-framework[5.2.x-dev].
- clarence/lumen-default-routes v1.0.3 requires laravel/lumen-framework 5.2.* -> satisfiable by laravel/lumen-framework[5.2.x-dev].
- clarence/lumen-default-routes v1.0.4 requires laravel/lumen-framework 5.2.* -> satisfiable by laravel/lumen-framework[5.2.x-dev].
- clarence/lumen-default-routes v1.0.5 requires laravel/lumen-framework 5.2.* -> satisfiable by laravel/lumen-framework[5.2.x-dev].
- Conclusion: don't install laravel/lumen-framework 5.2.x-dev
- Installation request for clarence/lumen-default-routes ^1.0 -> satisfiable by clarence/lumen-default-routes[v1.0.0, v1.0.1, v1.0.2, v1.0.3, v1.0.4, v1.0.5].

Installation failed, reverting ./composer.json to its original content.

[Clarence-pan]

Sorry, but I have no time to work with the latest versions. You're welcomed to modify the composer.json, test it with the latest versions and create a PR.