Update curator-test dependency (#70)
Update curator-test dependency (#70)

This PR upgrades the `curator-test` dependency for the `zk-test-cluster`. This is required for #69 which relies on container nodes introduced only after version 3.6.0 - see [here](https://zookeeper.apache.org/doc/current/zookeeperProgrammers.html#Container+Nodes)
bonifaido/rust-zookeeper,bonifaido/rust-zookeeper