Using anonymous migration classes for auto-generated migrations

[dmekhov]

Inspired by https://github.com/laravel/framework/pull/36906/files

[AnrDaemon]

What version it would target, if implemented?

[roxblnfk]

What version it would target, if implemented?

We haven't planned it yet

[AnrDaemon]

I think you don't understand. I want to implement it. But requirement constraints of the master branch are not sane.