int --> long in Model/Issue.cs

Author: kfcampbell

Octokit.GraphQL/Model/Issue.cs

@@ -97,7 +97,7 @@ internal Issue(Expression expression) : base(expression)
         /// <summary>
         /// Identifies the primary key from the database.
         /// </summary>
-        public int? DatabaseId { get; }
+        public long? DatabaseId { get; }
 
         /// <summary>
         /// The actor who edited the comment.