possible second bug in parsing

[Trevoke]

Wish I could describe this better, but:

• file: https://gist.github.com/Trevoke/a81cd8d5cd100ec9ccc855544afda04f
  error:

** (Protocol.UndefinedError) protocol Enumerable not implemented for {-6, 3} of type Tuple
    (elixir 1.13.4) lib/enum.ex:1: Enumerable.impl_for!/1
    (elixir 1.13.4) lib/enum.ex:155: Enumerable.count/1
    (elixir 1.13.4) lib/enum.ex:656: Enum.count/1
    (elixir_go 0.4.3) lib/go/parser/node.ex:233: Go.Parser.Node.placements_to_action/2
    (elixir_go 0.4.3) lib/go/parser/node.ex:120: Go.Parser.Node.get_actions/1
    (elixir 1.13.4) lib/enum.ex:1593: Enum."-map/2-lists^map/1-0-"/2
    (elixir_go 0.4.3) lib/go/game.ex:362: Go.Game.from_sgf/1