Investigate JEP 181: Nest-Based Access Control

[tgodzik]

JEP 181 introduced Nest-Based Access Control, which at a glance seems useful to Scala.

Since we are planning to update to a newer JDK at an unspecified future I hope we can figure out if this is in any way useful for us.

And if we can actually use them or whether it will be impossible for us.

Introduced in JDK 11

[som-snytt]

First look last year at scala/scala#10765

[tgodzik]

Looks like we could utilize it easily if we switch to at least JDK 11 then.