Made DiscordJsonSerializer public

src/Discord.Net.Rest/Serialization/Json/DiscordJsonSerializer.cs

@@ -4,7 +4,7 @@ using System.Reflection;
 
 namespace Discord.Serialization.Json
 {
-    internal class DiscordJsonSerializer : JsonSerializer
+    public class DiscordJsonSerializer : JsonSerializer
     {
         private static readonly Lazy<DiscordJsonSerializer> _singleton = new Lazy<DiscordJsonSerializer>();
         public static new DiscordJsonSerializer Global => _singleton.Value;
@@ -14,6 +14,7 @@ namespace Discord.Serialization.Json
             AddConverter<API.Image, ImagePropertyConverter>();
             AddConverter<long, Int53PropertyConverter>((type, prop) => prop?.GetCustomAttribute<Int53Attribute>() != null);
             AddConverter<ulong, UInt53PropertyConverter>((type, prop) => prop?.GetCustomAttribute<Int53Attribute>() != null);
+
             AddGenericConverter(typeof(API.EntityOrId<>), typeof(EntityOrIdPropertyConverter<>));
             AddGenericConverter(typeof(Optional<>), typeof(OptionalPropertyConverter<>));
         }