Sequoia-client-sdk

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* The `backoff_strategy` can be specified in the `read`, `browse`, `get` and `request` methods so it can be different from the one passed in the constructor.
* Set up the logger name to allow a better logging configuration

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* New parameter `retry_when_empty_result` for the `read`, `browse`, `get` and `request` methods to retry the query when resources are missing in the response.

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* Python 3.9 supported.
* Requirements upgraded.
* Drop the use of some libraries: jsonpickle, twine.
* Tox is installed in the Makefile when used.

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* New keyword `retry_http_status_codes` for the `backoff_strategy` to retry specific http status codes.
* Prospector version upgraded to 1.3.1 so it works with python versions 3.9.4, 3.8.9, 3.7.10, 3.6.13.
* Lint issues solved (OAuth2SessionTokenManagementWrapper request method signature).
* GitHub Actions configured to run lint and unit tests.

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* Two new methods added to Criterion object so the fluent API is easier to use: `add_inclusion` and `add_criterion`.

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* When token is expired, it is updated automatically with CLIENT_GRANT auth type,
the 401 response wasn't managed to do so, only the exception was.
Now the 401 response is treated like that.