Updated reference channel entities

ref/Events/ChannelUpdatedEventArgs.cs

@@ -4,8 +4,8 @@ namespace Discord
 {
     public class ChannelUpdatedEventArgs : EventArgs
     {
-        public Channel Before => null;
-        public Channel After => null;
+        public IChannel Before => null;
+        public IChannel After => null;
         public Server Server => null;
     }
 }

ref/Events/ChannelUserEventArgs.cs

@@ -1,8 +0,0 @@
-namespace Discord
-{
-    public class ChannelUserEventArgs 
-    {
-        public Channel Channel => null;
-        public User User => null;
-    }
-}

ref/Events/TypingEventArgs.cs

@@ -0,0 +1,14 @@
+namespace Discord
+{
+    public class TypingEventArgs 
+    {
+        public ITextChannel Channel { get; }
+        public User User { get; }
+
+        public TypingEventArgs(ITextChannel channel, User user)
+        {
+            Channel = channel;
+            User = user;
+        }
+    }
+}