Update elasticsearch to 7.0.2

[pyup-bot]

This PR updates elasticsearch from 6.0.0 to 7.0.2.

Changelog

7.0.2

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* Add connection parameter for Elastic Cloud cloud_id.
* ML client uses client object for _bulk_body requests

7.0.1

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* Use black to format the code.
* Update the test matrix to only use current pythons and 7.x ES
* Blocking pool must fit thread_count
* Update client to support missing ES 7 API's and query params.

7.0.0

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* Removed deprecated option ``update_all_types``.
* Using insecure SSL configuration (``verify_cert=False``) raises a warning, this can
 be not showed with ``ssl_show_warn=False``
* Add support for 7.x api's in Elasticsearch both xpack and oss flavors

6.3.0

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* Add an exponential wait on delays
* Fix issues with dependencies
* Adding X-pack Docs
* Adding forecast to x-pack ML client

6.2.0

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* 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

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

6.1.0

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* bad release

Links

• PyPI: https://pypi.org/project/elasticsearch
• Changelog: https://pyup.io/changelogs/elasticsearch/
• Repo: https://github.com/elastic/elasticsearch-py