Scheduled daily dependency update on Saturday

[pyup-bot]

Update docker from 3.5.0 to 3.7.2.

Changelog

3.7.1

-----

[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone/58?closed=1)

Bugfixes

* Set a different default number (which is now 9) for SSH pools
* Adds a BaseHTTPAdapter with a close method to ensure that the
pools is clean on close()
* Makes SSHHTTPAdapter reopen a closed connection when needed
like the others

3.7.0

-----

[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone/56?closed=1)

Features

* Added support for multiplexed streams (for `attach` and `exec_start`). Learn
more at https://docker-py.readthedocs.io/en/stable/user_guides/multiplex.html
* Added the `use_config_proxy` parameter to the following methods:
`APIClient.build`, `APIClient.create_container`, `DockerClient.images.build`
and `DockerClient.containers.run` (`False` by default). **This parameter**
**will become `True` by default in the 4.0.0 release.**
* Placement preferences for Swarm services are better validated on the client
and documentation has been updated accordingly

Bugfixes

* Fixed a bug where credential stores weren't queried for relevant registry
credentials with certain variations of the `config.json` file.
* `DockerClient.swarm.init` now returns a boolean value as advertised.

3.6.0

-----

[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone=55?closed=1)

Features

* Added support for connecting to the Docker Engine over SSH. Additional
dependencies for this feature can be installed with
`pip install "docker[ssh]"`
* Added support for the `named` parameter in `Image.save`, which may be
used to ensure the resulting tarball retains the image's name on save.

Bugfixes

* Fixed a bug where builds on Windows with a context path using the `\\?\`
prefix would fail with some relative Dockerfile paths.
* Fixed an issue where pulls made with the `DockerClient` would fail when
setting the `stream` parameter to `True`.

Miscellaneous

* The minimum requirement for the `requests` dependency has been bumped
to 2.20.0

3.5.1

-----

[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone/54?closed=1)

Miscellaneous

* Bumped version of `pyOpenSSL` in `requirements.txt` and `setup.py` to prevent
installation of a vulnerable version

* Docs fixes

Links

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

[pyup-bot]

Closing this in favor of #183