splat is no longer avaiable for Cross Module

[sequencer]

I'm using splat, aka :_* in Cross for cross module auto detection, e.g.

val scalaVersions = Seq("2.13.11", "2.13.10")
object somemodule extends Cross[SomeModule](scalaVersions : _*)
trait SomeModule extends Cross.Module[String]

However after #2511, it makes type check failed:

type mismatch;
[error]  found   : Seq[String]
[error]  required: Seq[mill.define.Cross.Factory[build.this.SomeModule]]
[error] object somemodule extends Cross[SomeModule](scalaVersions : _*)
[error]                                              ^
[error] one error found

I have been using this feature in mill 0.10, e.g.
https://github.com/sequencer/vector/blob/319d2989099f4abd979421180f2cab5ea1412147/build.sc#L235

will this feature be added back in mill 0.11+?

[sequencer]

OK, I found I can directly pass scalaVersions now, that's awesome.