Laravel 10.x (release in Feb 2023) will add type-hints
and return types to all application skeleton methods.
https://twitter.com/taylorotwell/status/1592227118481805312
这篇写得更清楚，看来会全面往 strict types 靠拢
https://twitter.com/enunomaduro/status/1592265085841543175
不过 laravel (或者 php) 一向的惯例就是不会一次叫你整个转，
慢慢来应该没差