RUSTSEC-2016-0006 `cassandra` crate is unmaintained; use `cassandra-cpp` instead

The cassandra crate has not seen a release since December 2016, and its author is unresponsive. The cassandra-cpp crate is a maintained fork: https://github.com/Metaswitch/cassandra-rs...

`cassandra` crate is unmaintained; use `cassandra-cpp` instead

The cassandra crate has not seen a release since December 2016, and its author is unresponsive. The cassandra-cpp crate is a maintained fork: https://github.com/Metaswitch/cassandra-rs...