Handle lists as right end point of Ranges

@A..@b should mean @.elems .. @b.elems.
We already had code to explicitly handle a list on the left hand side.
That it worked on the right hand side was probably due to some side
effect of the implementation that we lost when refactoring.
Add code to explicitly handle it once and for all instead.

src/core/Range.pm

@@ -35,9 +35,11 @@ my class Range is Cool does Iterable does Positional {
           $max == Inf || $min == -Inf,
         );
     }
-    multi method new($min is copy, $max, :$excludes-min, :$excludes-max) {
+    multi method new($min is copy, $max is copy, :$excludes-min, :$excludes-max) {
         $min = +$min
           if nqp::istype($min,List) || nqp::istype($min,Match);
+        $max = +$max
+          if nqp::istype($max,List) || nqp::istype($max,Match);
         nqp::create(self).BUILD($min, $max, $excludes-min, $excludes-max);
     }