Fixed session resuming

src/Discord.Net/API/DiscordAPIClient.cs

@@ -372,6 +372,7 @@ namespace Discord.API
         {
             var msg = new ResumeParams()
             {
+                Token = _authToken,
                 SessionId = sessionId,
                 Sequence = lastSeq
             };

src/Discord.Net/API/Gateway/ResumeParams.cs

@@ -4,6 +4,8 @@ namespace Discord.API.Gateway
 {
     public class ResumeParams
     {
+        [JsonProperty("token")]
+        public string Token { get; set; }
         [JsonProperty("session_id")]
         public string SessionId { get; set; }
         [JsonProperty("seq")]

src/Discord.Net/Net/Converters/DiscordContractResolver.cs

@@ -43,7 +43,7 @@ namespace Discord.Net.Converters
                     if (converter == null)
                     {
                         var innerConverter = GetConverter(propInfo, innerTypeOutput);
-                        converter = converterType.DeclaredConstructors.FirstOrDefault().Invoke(new object[] { innerConverter }) as JsonConverter;
+                        converter = converterType.DeclaredConstructors.First().Invoke(new object[] { innerConverter }) as JsonConverter;
                         instanceField.SetValue(null, converter);
                     }
                 }