Disable invariant-cc test

Author: noti0na1

tests/pos-custom-args/captures/invariant-cc.scala renamed to tests/pos-custom-args/captures/invariant-cc.scala.disabled

@@ -3,6 +3,8 @@ import scala.annotation.unchecked.uncheckedVariance
 
 trait IterableFactory[+CC[_]] extends Pure:
 
+  // TODO: elem.type is not a singleton type
+
   def fill[A](n: Int)(elem: => A): CC[A]^{elem} = ???
   def fill[A](n1: Int, n2: Int)(elem: => A): CC[(CC[A]^{elem}) @uncheckedVariance]^{elem} =
   	fill[CC[A]^{elem}](n1)(fill(n2)(elem))