Laravel 11 new generic types

[GeniJaho]

Relates to #263.

• Makes the rule as non-configurable, as before, so users won't need to change their configurations.
• The check for the Laravel version is done within the rule, using Reflection, and checking the VERSION const of the Laravel Application class. Should we refactor this functionality into a class of its own, or wait for when we reach for it on future rules?
• I've used the Laravel Container's when-needs-give capabilities to provide an optional Application class for testing the two versions.
• I'm not sure if there is any performance penalty for doing that check on every model relationship. I don't think there is any significant penalty, but it's still something to remember.

Is there a better way to do this @peterfox?