Log Message:
databases/py-elasticsearch: Update to 6.2.0.

6.2.0
------------------

- cleanup for SSL Context
- Add X-Pack clients to -py
- Adding Gzip support for capacity constrained networks
- ``_routing`` in bulk action has been deprecated in ES. Introduces a
  breaking change if you use ``routing`` as a field in your documents.

6.1.1
------------------

- Updates to SSLContext logic to make it easier to use and have saner
  defaults.
- Doc updates

6.1.0
------------------

- Bad release