Does this package support Lumen?

[gpibarra]

In this comment say "no" #16 (comment) but this merge say "maybe" #26

For example, Lumen has no helper config_path(). Here code with lumen compatibility:
https://github.com/spatie/laravel-query-builder/blob/master/src/QueryBuilderServiceProvider.php#L11-L15
In this package:
https://github.com/spatie/laravel-package-tools/blob/master/src/PackageServiceProvider.php#L47-L49

I could do a PR to correct this, but I'm not sure you will approve if Lumen is not a priority