Rest argument feature is missing

[barisyild]

Example use of feature:

class Test {
  static function main() {
    rest("Haxe", "is", "great", "!");
  }

  static function rest(...restArray:String)
  {
    for(restParam in restArray)
    {
      trace(restParam);
    }
  }
}

https://try.haxe.org/#2AbB16cb