Officially support Python 3.9, 3.10 on PyPI

[uri-rodberg]

PyPi only lists support of s3transfer to Python <= 3.8. I would like to see s3transfer officially supporting newer versions - Python 3.9, 3.10. And also, development status on PyPI is 3 - Alpha - can you increase it to 5 - Production/Stable maybe?

From my testing, s3transfer==0.5.0 works with Python 3.9, 3.10.

[nateprewitt]

Hi @uri-rodberg, we have added updated version support to the setup.py for s3transfer. There just hasn't been a feature update to warrant a new upload to PyPI since then. The next release will update the public metadata.

In regards to Alpha vs Stable, s3transfer is still considered an implementation detail of Botocore. It's not intended or supported as a stand-alone product which is the reason for the current classification. If the library ever reaches a 1.0 release, it should have the development status updated.

[uri-rodberg]

Thank you.

[jpl-jengelke]

@uri-rodberg @nateprewitt The s3transfer package may run on newer Pythons, but threading changed in Python 3.8, so if it is being used in a threaded application, something is broken at 0.4.0. (It bit me!) This ticket advises rolling the product back to 0.3.x (rolling back Boto3 to an older version effectively does just that) when those issues pop up.