importlib_metadata >= 2.0 breaks scanpy.logging.print_versions()

[grst]

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of scanpy.
• (optional) I have confirmed this bug exists on the master branch of scanpy.

---

When scanpy gets installed with the latest version of importlib_metadata (2.0), the
command sc.logging.print_versions() fails with the following error:

WARNING: If you miss a compact list, please try `print_header`!
Traceback (most recent call last):
  File "/home/sturm/anaconda3/envs/scanpy_test/lib/python3.7/site-packages/sinfo/main.py", line 195, in sinfo
    mod_version = _find_version(mod.__version__)
AttributeError: module 'importlib_metadata' has no attribute '__version__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/sturm/anaconda3/envs/scanpy_test/lib/python3.7/site-packages/scanpy/logging.py", line 161, in print_versions
    sinfo(dependencies=True)
  File "/home/sturm/anaconda3/envs/scanpy_test/lib/python3.7/site-packages/sinfo/main.py", line 198, in sinfo
    mod_version = _find_version(mod.version)
  File "/home/sturm/anaconda3/envs/scanpy_test/lib/python3.7/site-packages/sinfo/main.py", line 42, in _find_version
    return mod_version_attr()
TypeError: version() missing 1 required positional argument: 'distribution_name'

According to the importlib_metadata changelog, the __version__ attribute has been removed from the package:

=========================
 importlib_metadata NEWS
=========================

v2.0.0
======

* ``importlib_metadata`` no longer presents a
  ``__version__`` attribute. Consumers wishing to
  resolve the version of the package should query it
  directly with
  ``importlib_metadata.version('importlib-metadata')``.
  Closes #71.

[grst]

While trying to fix it, I figured that the problem is upstream in sinfo.
Here's the issue I created:
https://gitlab.com/joelostblom/sinfo/-/issues/8

Feel free to close, or keep open until the problem is solved there.