Fix Lua.Table.as_string with nested tables (#57)

guides/working-with-lua.livemd

@@ -4,7 +4,7 @@
 
 ```elixir
 Mix.install([
-  {:lua, "~> 0.0.20"}
+  {:lua, "~> 0.0.21"}
 ])
 ```
 

lib/lua/table.ex

@@ -138,6 +138,7 @@ defmodule Lua.Table do
   defp format_value(key, value, formatter) do
     case formatter.(key, value) do
       list when is_list(list) -> "{#{print_table(list, formatter)}}"
+      map when is_map(map) -> "{#{print_table(map, formatter)}}"
       {:userdata, _value} -> inspect("<userdata>")
       true -> "true"
       false -> "false"

mix.exs

@@ -2,7 +2,7 @@ defmodule Lua.MixProject do
   use Mix.Project
 
   @url "https://github.com/tv-labs/lua"
-  @version "0.0.20"
+  @version "0.0.21"
 
   def project do
     [

test/lua/table_test.exs

@@ -58,6 +58,12 @@ defmodule Lua.TableTest do
                ~S<{a = 1, b = "~D[2024-09-22]"}>
     end
 
+    test "it can handle nested maps" do
+      table = [a: 1, b: 2, c: %{d: %{e: 5}}]
+
+      assert Lua.Table.as_string(table) == "{a = 1, b = 2, c = {d = {e = 5}}}"
+    end
+
     # We can't handle self-referential tables as
     # Luerl cannot decode them
     @tag :skip