Update docker to 4.1.0

[pyup-bot]

This PR updates docker from 3.7.0 to 4.1.0.

Changelog

4.0.2

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[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone/62?closed=1)

Bugfixes

- Unified the way `HealthCheck` is created/configured

Miscellaneous

- Bumped version of websocket-client

4.0.1

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[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone/60?closed=1)

Bugfixes

- Fixed an obsolete import in the `credentials` subpackage that caused import errors in
Python 3.7

Miscellaneous

- Docs building has been repaired

4.0.0

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[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone/57?closed=1)

Breaking changes

- Support for Python 3.3 and Python 3.4 has been dropped
- `APIClient.update_service`, `APIClient.init_swarm`, and
`DockerClient.swarm.init` now return a `dict` from the API's response body
- In `APIClient.build` and `DockerClient.images.build`, the `use_config_proxy`
parameter now defaults to True
- `init_path` is no longer a valid parameter for `HostConfig`

Features

- It is now possible to provide `SCTP` ports for port mappings
- `ContainerSpec`s now support the `init` parameter
- `DockerClient.swarm.init` and `APIClient.init_swarm` now support the
`data_path_addr` parameter
- `APIClient.update_swarm` and `DockerClient.swarm.update` now support the
`rotate_manager_unlock_key` parameter
- `APIClient.update_service` returns the API's response body as a `dict`
- `APIClient.init_swarm`, and `DockerClient.swarm.init` now return the API's
response body as a `dict`

Bugfixes

- Fixed `PlacementPreference` instances to produce a valid API type
- Fixed a bug where not setting a value for `buildargs` in `build` could cause
the library to attempt accessing attributes of a `None` value
- Fixed a bug where setting the `volume_driver` parameter in
`DockerClient.containers.create` would result in an error
- `APIClient.inspect_distribution` now correctly sets the authentication
headers on the request, allowing it to be used with private repositories
This change also applies to `DockerClient.get_registry_data`

3.7.2

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[List of PRs / issues for this release](https://github.com/docker/docker-py/milestone/59?closed=1)

Bugfixes

* Fix base_url to keep TCP protocol on utils.py by letting the responsability of changing the
protocol to `parse_host` afterwards, letting `base_url` with the original value.
* XFAIL test_attach_stream_and_cancel on TLS

3.7.1

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[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

Links

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