Migration from Kryo 4 to Kryo 5

In most cases, Kryo 5 and Kryo 4 are *not* serialization compatible.

If you need to migrate persistent data, the best approach is to have both Kryo 4 and Kryo 5 on the classpath, read old data with Kryo 4 and write it with Kryo 5.

For more information, see https://github.com/EsotericSoftware/kryo/wiki/Migration-to-v5