Read importlib.metadata to find transport / compressor extensions#697

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arthurlm wants to merge 2 commits intopiskvorky:developfrom

arthurlm:develop

Commits on Apr 30, 2022

Add reading of setuptools metadata to find smart_open transport / compressor extensions
arthurlm
committed

Commits on May 1, 2022

Handle multiple version of python importlib and add compat library for legacy python versions
arthurlm
committed