Add `IsAutocomplete` to rest command options (#368)

src/Discord.Net.Core/Entities/Interactions/IApplicationCommandOption.cs

@@ -32,6 +32,11 @@ namespace Discord
         /// </summary>
         bool? IsRequired { get; }
 
+        /// <summary>
+        ///     Gets whether or not the option has autocomplete enabled.
+        /// </summary>
+        bool? IsAutocomplete { get; }
+
         /// <summary>
         ///     Gets the smallest number value the user can input.
         /// </summary>

src/Discord.Net.Rest/API/Common/ApplicationCommandOption.cs

@@ -56,6 +56,7 @@ namespace Discord.API
             Default = cmd.IsDefault ?? Optional<bool>.Unspecified;
             MinValue = cmd.MinValue ?? Optional<double>.Unspecified;
             MaxValue = cmd.MaxValue ?? Optional<double>.Unspecified;
+            Autocomplete = cmd.IsAutocomplete ?? Optional<bool>.Unspecified;
 
             Name = cmd.Name;
             Type = cmd.Type;

src/Discord.Net.Rest/Entities/Interactions/RestApplicationCommandOption.cs

@@ -26,6 +26,9 @@ namespace Discord.Rest
         /// <inheritdoc/>
         public bool? IsRequired { get; private set; }
 
+        /// <inheritdoc/>
+        public bool? IsAutocomplete { get; private set; } 
+
         /// <inheritdoc/>
         public double? MinValue { get; private set; }
 
@@ -74,6 +77,9 @@ namespace Discord.Rest
             if (model.MaxValue.IsSpecified)
                 MaxValue = model.MaxValue.Value;
 
+            if (model.Autocomplete.IsSpecified)
+                IsAutocomplete = model.Autocomplete.Value;
+
             Options = model.Options.IsSpecified
                 ? model.Options.Value.Select(Create).ToImmutableArray()
                 : ImmutableArray.Create<RestApplicationCommandOption>();

src/Discord.Net.WebSocket/Entities/Interaction/SocketBaseCommand/SocketApplicationCommandOption.cs

@@ -25,6 +25,8 @@ namespace Discord.WebSocket
         /// <inheritdoc/>
         public bool? IsRequired { get; private set; }
 
+        public bool? IsAutocomplete { get; private set; }
+
         /// <inheritdoc/>
         public double? MinValue { get; private set; }
 
@@ -68,6 +70,8 @@ namespace Discord.WebSocket
 
             MaxValue = model.MaxValue.ToNullable();
 
+            IsAutocomplete = model.Autocomplete.ToNullable();
+
             Choices = model.Choices.IsSpecified
                 ? model.Choices.Value.Select(SocketApplicationCommandChoice.Create).ToImmutableArray()
                 : ImmutableArray.Create<SocketApplicationCommandChoice>();