fix: Revert PremiumSubscriptionCount type (#1686)

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

@@ -69,7 +69,7 @@ namespace Discord.API
         [JsonProperty("max_members")]
         public Optional<int> MaxMembers { get; set; }
         [JsonProperty("premium_subscription_count")]
-        public Optional<int> PremiumSubscriptionCount { get; set; }
+        public int? PremiumSubscriptionCount { get; set; }
         [JsonProperty("preferred_locale")]
         public string PreferredLocale { get; set; }
         [JsonProperty("public_updates_channel_id")]

src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs

@@ -161,8 +161,7 @@ namespace Discord.Rest
             BannerId = model.Banner;
             SystemChannelFlags = model.SystemChannelFlags;
             Description = model.Description;
-            if (model.PremiumSubscriptionCount.IsSpecified)
-                PremiumSubscriptionCount = model.PremiumSubscriptionCount.Value;
+            PremiumSubscriptionCount = model.PremiumSubscriptionCount.GetValueOrDefault();
             if (model.MaxPresences.IsSpecified)
                 MaxPresences = model.MaxPresences.Value ?? 25000;
             if (model.MaxMembers.IsSpecified)

src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs

@@ -448,8 +448,7 @@ namespace Discord.WebSocket
             BannerId = model.Banner;
             SystemChannelFlags = model.SystemChannelFlags;
             Description = model.Description;
-            if (model.PremiumSubscriptionCount.IsSpecified)
-                PremiumSubscriptionCount = model.PremiumSubscriptionCount.Value;
+            PremiumSubscriptionCount = model.PremiumSubscriptionCount.GetValueOrDefault();
             if (model.MaxPresences.IsSpecified)
                 MaxPresences = model.MaxPresences.Value ?? 25000;
             if (model.MaxMembers.IsSpecified)