Fixed: In some cases MinVotes is int from v0.2, causes migration failure

src/NzbDrone.Core/Datastore/Converters/StringConverter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+public class StringConverter : JsonConverter<string>
+{
+    public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        if (reader.TokenType == JsonTokenType.Number)
+        {
+            var stringValue = reader.GetInt32();
+            return stringValue.ToString();
+        }
+        else if (reader.TokenType == JsonTokenType.String)
+        {
+            return reader.GetString();
+        }
+
+        throw new System.Text.Json.JsonException();
+    }
+
+    public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options)
+    {
+        writer.WriteStringValue(value);
+    }
+}

src/NzbDrone.Core/Datastore/Migration/166_fix_tmdb_list_config.cs

@@ -25,6 +25,8 @@ namespace NzbDrone.Core.Datastore.Migration
                 PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
                 WriteIndented = true
             };
+
+            _serializerSettings.Converters.Add(new StringConverter());
         }
 
         protected override void MainDbUpgrade()