(ifcbrk) feature: Add includeRoleIds to PruneUsersAsync (#1581)

* Implemented include_roles for guilds/id/prune get&post

* Unnecessary using

Co-authored-by: Paulo <pnmanjos@hotmail.com>

src/Discord.Net.Rest/API/Rest/GuildPruneParams.cs

@@ -9,9 +9,13 @@ namespace Discord.API.Rest
         [JsonProperty("days")]
         public int Days { get; }
 
-        public GuildPruneParams(int days)
+        [JsonProperty("include_roles")]
+        public ulong[] IncludeRoleIds { get; }
+
+        public GuildPruneParams(int days, ulong[] includeRoleIds)
         {
             Days = days;
+            IncludeRoleIds = includeRoleIds;
         }
     }
 }