keep obsolete properties and return types for compatibility

src/Discord.Net.Core/Entities/Invites/IInviteMetadata.cs

@@ -15,6 +15,10 @@ namespace Discord
         ///     <c>false</c>.
         /// </returns>
         bool IsTemporary { get; }
+
+        [Obsolete("This will always return false. If an invite is revoked, it will not be found and the invite will be null.")]
+        bool IsRevoked { get; }
+
         /// <summary>
         ///     Gets the time (in seconds) until the invite expires.
         /// </summary>
@@ -22,7 +26,7 @@ namespace Discord
         ///     An <see cref="int"/> representing the time in seconds until this invite expires; <c>null</c> if this
         ///     invite never expires.
         /// </returns>
-        int MaxAge { get; }
+        int? MaxAge { get; }
         /// <summary>
         ///     Gets the max number of uses this invite may have.
         /// </summary>
@@ -30,20 +34,20 @@ namespace Discord
         ///     An <see cref="int"/> representing the number of uses this invite may be accepted until it is removed
         ///     from the guild; <c>null</c> if none is set.
         /// </returns>
-        int MaxUses { get; }
+        int? MaxUses { get; }
         /// <summary>
         ///     Gets the number of times this invite has been used.
         /// </summary>
         /// <returns>
         ///     An <see cref="int"/> representing the number of times this invite has been used.
         /// </returns>
-        int Uses { get; }
+        int? Uses { get; }
         /// <summary>
         ///     Gets when this invite was created.
         /// </summary>
         /// <returns>
         ///     A <see cref="DateTimeOffset"/> representing the time of which the invite was first created.
         /// </returns>
-        DateTimeOffset CreatedAt { get; }
+        DateTimeOffset? CreatedAt { get; }
     }
 }

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

@@ -16,5 +16,7 @@ namespace Discord.API
         public bool Temporary { get; set; }
         [JsonProperty("created_at")]
         public DateTimeOffset CreatedAt { get; set; }
+        [Obsolete("This will always return false. If an invite is revoked, it will not be found and the invite will be null.")]
+        public bool Revoked { get; set; }
     }
 }

src/Discord.Net.Rest/Entities/Invites/RestInviteMetadata.cs

@@ -8,17 +8,19 @@ namespace Discord.Rest
     {
         private long _createdAtTicks;
 
+        [Obsolete("This will always return false. If an invite is revoked, it will not be found and the invite will be null.")]
+        public bool IsRevoked { get; private set; }
         /// <inheritdoc />
         public bool IsTemporary { get; private set; }
         /// <inheritdoc />
-        public int MaxAge { get; private set; }
+        public int? MaxAge { get; private set; }
         /// <inheritdoc />
-        public int MaxUses { get; private set; }
+        public int? MaxUses { get; private set; }
         /// <inheritdoc />
-        public int Uses { get; private set; }
+        public int? Uses { get; private set; }
 
         /// <inheritdoc />
-        public DateTimeOffset CreatedAt => DateTimeUtils.FromTicks(_createdAtTicks);
+        public DateTimeOffset? CreatedAt => DateTimeUtils.FromTicks(_createdAtTicks);
 
         internal RestInviteMetadata(BaseDiscordClient discord, IGuild guild, IChannel channel, string id)
             : base(discord, guild, channel, id)