I am not sure about laravel maybe there is an artisan outside who is qualified.
but since they use a semver pattern for versioning and they are a dominant framework:
there are however tools, Tomáš Votruba, a really nice guy from czech wrote an auto upgrade tool: github.com/rectorphp/rector
which refactors a lot of the code of most frameworks automatically. You just need to check if he supports laravel.