Support Laravel 11

[alifaraun]

Hey @JeffreyWay,

With Laravel 11 now released, I’ve taken the opportunity to add full support for it. Along with this update, I’ve:

• Updated the migration style to use anonymous classes, aligning with Laravel’s structure since version 8.23.
• Dropped support for older Laravel versions, focusing on compatibility from Laravel 9 through 11.
• Updated the documentation (README.md).

I've tested everything against Laravel 11, and it works perfectly 🎉.

could you please review, merge?

Thanks in advance!