Avoid warning about deprecated enum case at definition

[bishabosha]

Minimized code

enum Color { @deprecated("no Red", "0.1") case Red }

Output

-- Deprecation Warning: Color.scala:1:13 ---------------------------------------
1 |enum Color { @deprecated("no Red", "0.1") case Red }
  |             ^
  |             value Red in object Color is deprecated since 0.1: no Red
1 warning found

Expectation

I expect the warning only on usages outside of the enum

[bishabosha]

my proposal for now is to use @nowarn("cat=deprecation") to $values and valueOf when support is added.

[bishabosha]

or to add usage within a synthetic definition as another exception to emitting deprecated warning