Boto-session-manager

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**Features and Improvements**

- Add auto refreshable session support (beta). Note that it is using ``AssumeRoleCredentialFetcher`` and ``DeferredRefreshableCredentials`` from botocore, which is not public API officially supported by botocore.

**Minor Improvements**

- Use Sentinel ``NOTHING`` instead of ``None`` to remove the ambiguity of ``None`` value.

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**Miscellaneous**

- Add ``boto3`` as explicit dependency.
- Change license from MIT to Apache 2.0

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**Bugfixes**

- Fix a bug that the client object cannot locate the right boto3 stubs.

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**Features and Improvements**

- Now all the client and it's methods support auto complete and type hint. You have to do ``pip install "boto3-stubs[all]"`` to enable "Client method auto complete" and "Arguments type hint" features.

**Bugfixes**

- Fix a bug that :meth:`~boto_session_manager.manager.BotoSesManager.awscli()`` context manager doesn't work properly.

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**Features and Improvements**

- Add boto3 documentation link in doc string

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**Features and Improvements**

- Allow to call :meth:`~boto_session_manager.manager.BotoSesManager.clear_cache()` to clear all cached boto session and client.
- Add ton's of property method to access the cached boto client.
- Update the list of AWS service to the latest (as of 2022-12-10), which are 333 services.