Add user votes response class (#87)

* Update Responses.cs

* comments

src/GregClient/Responses/Responses.cs

@@ -217,4 +217,19 @@ public class UserPackages
 
         public List<PackageVersion> maintains { get; set; }
     }
+    /// <summary>
+    /// Used to handle response from /user/votes route
+    /// to fetch all packages the current user has upvoted
+    /// </summary>
+    public class UserVotes
+    {
+        public string username { get; set; }
+
+        public string _id { get; set; }
+
+        /// <summary>
+        /// List of package ids that the current user has upvoted
+        /// </summary>
+        public List<string> has_upvoted { get; set; }
+    }
 }