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
這篇寫得更清楚，看來會全面往 strict types 靠攏
https://twitter.com/enunomaduro/status/1592265085841543175
不過 laravel (或者 php) 一向的慣例就是不會一次叫你整個轉，
慢慢來應該沒差