message: Add version 1.2.0 changes to change log
diff: +### v 1.2.0
  +
  +* Fixed reconnection when a node went down and evaluation of peer address returns an error
  +* Introduced `IntoCDRSBytes` trait and created the [auto derive](https://github.com/AlexPikalov/into-cdrs-value-derive). See [example](https://github.com/AlexPikalov/into-cdrs-value-derive/tree/master/example) on how to use derive for values needed to be converted into CDRS `Value` which could be passed into query builder as a value
  +* Performance of node health check was improved
  +
  ### v 1.1.0
  * Create `Blob` type. It's a wrapper for `Vec<u8>` which represents Cassandra
  