Update s3transfer to 0.2.0

[pyup-bot]

This PR updates s3transfer from 0.1.13 to 0.2.0.

Changelog

0.2.0

=====

* feature:``ProcessPoolDownloader``: Add ``ProcessPoolDownloader`` class to speed up download throughput by using processes instead of threads.

Links

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

[coveralls]

Pull Request Test Coverage Report for Build 669

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 44.861%

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Totals
Change from base Build 639:	0.0%
Covered Lines:	323
Relevant Lines:	720

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 669

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 44.861%

---

Totals
Change from base Build 639:	0.0%
Covered Lines:	323
Relevant Lines:	720

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💛 - Coveralls