Update s3transfer to 0.4.2

[pyup-bot]

This PR updates s3transfer from 0.3.3 to 0.4.2.

Changelog

0.4.2

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* enhancement:s3: Add support for ``ExpectedBucketOwner``. Fixes `181 <https://github.com/boto/s3transfer/issues/181>`__.

0.4.1

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* enhancement:``crt``: Add ``set_exception`` to ``CRTTransferFuture`` to allow setting exceptions in subscribers.

0.4.0

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* feature:``crt``: Add optional AWS Common Runtime (CRT) support. The AWS CRT provides a C-based S3 transfer client that can improve transfer throughput.

0.3.7

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* bugfix:ReadFileChunk: Fix seek behavior in ReadFileChunk class

0.3.6

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* bugfix:packaging: Fix setup.py metadata for `futures` on Python 2.7

0.3.5

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* enhancement:``s3``: Block TransferManager methods for S3 Object Lambda resources

0.3.4

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* enhancement:s3: Add server side encryption context into allowed list

Links

• PyPI: https://pypi.org/project/s3transfer
• Changelog: https://pyup.io/changelogs/s3transfer/
• Repo: https://github.com/boto/s3transfer

[pyup-bot]

Closing this in favor of #859