Commits on Sep 13, 2022

1. Only use importlib.resources's new files() / Traversable API on Pytho… …

   …n ≥3.11
   
   Using importlib.resource's files() API on 3.9 and 3.10 causes a
   TypeError on 3.9 and a ValueError on 3.10 when running under a
   third-party meta path importer (like PyOxidizer's OxidizedImporter) that
   doesn't support the relatively-new API.  This is because the full
   adapter layer (importlib.resources._adapters) for the older importlib
   resources API doesn't exist until Python 3.11.
   
   The older resources API is now used by 3.7–3.10, as it was prior to the
   certifi 2022.06.15.1 release.  This codepath has existed in certifi
   since April 2020 (3fc8fec).
   
   An alternative to this change would be testing the actual importer in
   use at runtime (e.g. certifi.__loader__) for files() support, but that
   seemed more complex than reverting to the previous codepath here.
   
   Resolves: certifi#203
   Related-to: certifi#199
   Related-to: certifi#123

   

   tsibley committed Sep 13, 2022
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