Preliminary support for APIv9 and threads

Myriad/Gateway/Events/GuildCreateEvent.cs

@@ -6,5 +6,6 @@ namespace Myriad.Gateway
     {
         public Channel[] Channels { get; init; }
         public GuildMember[] Members { get; init; }
+        public Channel[] Threads { get; init; }
     }
 }

Myriad/Gateway/Events/IGatewayEvent.cs

@@ -21,6 +21,10 @@ namespace Myriad.Gateway
             {"CHANNEL_CREATE", typeof(ChannelCreateEvent)},
             {"CHANNEL_UPDATE", typeof(ChannelUpdateEvent)},
             {"CHANNEL_DELETE", typeof(ChannelDeleteEvent)},
+            {"THREAD_CREATE", typeof(ThreadCreateEvent)},
+            {"THREAD_UPDATE", typeof(ThreadUpdateEvent)},
+            {"THREAD_DELETE", typeof(ThreadDeleteEvent)},
+            {"THREAD_LIST_SYNC", typeof(ThreadListSyncEvent)},
             {"MESSAGE_CREATE", typeof(MessageCreateEvent)},
             {"MESSAGE_UPDATE", typeof(MessageUpdateEvent)},
             {"MESSAGE_DELETE", typeof(MessageDeleteEvent)},

Myriad/Gateway/Events/ThreadCreateEvent.cs

@@ -0,0 +1,6 @@
+using Myriad.Types;
+
+namespace Myriad.Gateway
+{
+    public record ThreadCreateEvent: Channel, IGatewayEvent;
+}

Myriad/Gateway/Events/ThreadDeleteEvent.cs

@@ -0,0 +1,12 @@
+using Myriad.Types;
+
+namespace Myriad.Gateway
+{
+    public record ThreadDeleteEvent: IGatewayEvent
+    {
+        public ulong Id { get; init; }
+        public ulong? GuildId { get; init; }
+        public ulong? ParentId { get; init; }
+        public Channel.ChannelType Type { get; init; }
+    }
+}

Myriad/Gateway/Events/ThreadListSyncEvent.cs

@@ -0,0 +1,11 @@
+using Myriad.Types;
+
+namespace Myriad.Gateway
+{
+    public record ThreadListSyncEvent: IGatewayEvent
+    {
+        public ulong GuildId { get; init; }
+        public ulong[]? ChannelIds { get; init; }
+        public Channel[] Threads { get; init; }
+    }
+}

Myriad/Gateway/Events/ThreadUpdateEvent.cs

@@ -0,0 +1,6 @@
+using Myriad.Types;
+
+namespace Myriad.Gateway
+{
+    public record ThreadUpdateEvent: Channel, IGatewayEvent;
+}

Myriad/Gateway/ShardConnection.cs

@@ -82,7 +82,7 @@ namespace Myriad.Gateway
         
         private Uri GetConnectionUri(string baseUri) => new UriBuilder(baseUri)
         {
-            Query = "v=8&encoding=json"
+            Query = "v=9&encoding=json"
         }.Uri;
 
         private async Task CloseInner(WebSocketCloseStatus closeStatus, string? description)