Importlib_resources 5.1 and 5.2 introduced the following changes (more details at https://importlib-resources.readthedocs.io/en/latest/history.html#v5-2-1):

- Added ``simple`` module implementing adapters from a low-level resources reader interface to a ``TraversableResources`` interface.
- Legacy API (``path``, ``contents``, ...) is now supported entirely by the ``.files()`` API with a compatibility shim supplied for resource loaders without that functionality.

Let's incorporate those into the stdlib version.

I've put together a patch based on 3b24bd6307">python/importlib_resources@3b24bd6307, and interestingly, the tests pass... which is a little concerning because in https://github.com/python/importlib_resources/pull/221#discussion_r659214483, I describe a compatibility concern that I believe will be present only on the CPython implementation. Before we merge the changes, I'd like to (a) address that concern and (b) ideally write a test that captures that concern.

On further consideration, the concern I had may not be manifest in the implementation. It may be the _adapters.wrap_spec provides all the compatibility that's needed. I'll see if I can concoct an idiomatic case, but I may find that there's no concern at all.

In [this comment](https://github.com/python/importlib_resources/pull/221#discussion_r679124389), I did more analysis and assuaged my own concerns about the implementation. Everything seems to be working as intended, thanks to the strong work by FFY00.

New changeset aaa83cdfab6817446285e631232f64b394ac6791 by Jason R. Coombs in branch 'main':
bpo-44771: Apply changes from importlib_resources 5.2.1 (GH-27436)
https://github.com/python/cpython/commit/aaa83cdfab6817446285e631232f64b394ac6791

Seems that PR 27436 has broken several buildbots. For instance:

https://buildbot.python.org/all/#/builders/350/builds/474

Following our buildbot policy, we will sadly need to revert in 24 if is not fixed.

New changeset e63e6311aa258a5f3f49a7aed9fdde445fd384d6 by Jason R. Coombs in branch 'main':
bpo-44771: Sync with importlib_resources 5.2.2, fixing refleak. (#27497)
https://github.com/python/cpython/commit/e63e6311aa258a5f3f49a7aed9fdde445fd384d6

test_importlib.test_read_bytes() is failing for 1 month on AMD64 Windows8.1 Non-Debug 3.x. Please see bpo-45078, the regression may be caused by the commit aaa83cdfab6817446285e631232f64b394ac6791.

Reported concern can be addressed in the new issue.