Update to Labs 3.5.0 (#1971)

* Merge https://github.com/Discord-Net-Labs/Discord.Net-Labs into patch/labs3.5.0

* Add missing periods

src/Discord.Net.Core/Interactions/IRestInteractionContext.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    public interface IRestInteractionContext : IInteractionContext
+    {
+        /// <summary>
+        ///     Gets or sets the callback to use when the service has outgoing json for the rest webhook.
+        /// </summary>
+        /// <remarks>
+        ///     If this property is <see langword="null"/> the default callback will be used.
+        /// </remarks>
+        Func<string, Task> InteractionResponseCallback { get; }
+    }
+}