Are there any plans to support generating the [Rabin 64 bit fingerprint](https://avro.apache.org/docs/1.7.7/api/java/org/apache/avro/SchemaNormalization.html#fingerprint64(byte[])) for a schema? There's currently [a standalone package](https://github.com/spikepanx/avro-crc64) that does this, but it seems like it would make sense to support directly in this package.