Adding BotHTTPInteraction user flag (#252)

src/Discord.Net.Core/Entities/Users/UserProperties.cs

@@ -61,9 +61,13 @@ namespace Discord
         ///     Flag given to users that developed bots and early verified their accounts.
         /// </summary>
         EarlyVerifiedBotDeveloper = 1 << 17,
-         /// <summary>
+        /// <summary>
         ///     Flag given to users that are discord certified moderators who has give discord's exam.
         /// </summary>
         DiscordCertifiedModerator = 1 << 18,
+        /// <summary>
+        ///     Flag given to bots that use only outgoing webhooks, exclusively.
+        /// </summary>
+        BotHTTPInteractions = 1 << 19,
     }
 }