Replace pkg_resources.parse_version by packaging.version.Version

[berhoel]

PR Summary

PR checklist

Please make sure that the following things have been addressed (and check the relevant checkboxes):

• Commits respect our guidelines

• Tests are passing properly (see here on how to run Elpy's tests)
  running ./scripts/test python reports the following problems:

  ======================================================================
  ERROR: test_fix_code (tests.test_yapf.YAPFTestCase.test_fix_code)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/home/hoel/work/code-root/github.com/elpy/elpy/yapfutil.py", line 31, in fix_code
      reformatted_source, _ = yapf_api.FormatCode(code,
                              ^^^^^^^^^^^^^^^^^^^^^^^^^
  TypeError: FormatCode() got an unexpected keyword argument 'verify'
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "/home/hoel/work/code-root/github.com/elpy/elpy/tests/test_yapf.py", line 37, in test_fix_code
      self._assert_format(src, expected)
    File "/home/hoel/work/code-root/github.com/elpy/elpy/tests/test_yapf.py", line 40, in _assert_format
      new_block = yapfutil.fix_code(src, os.getcwd())
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/home/hoel/work/code-root/github.com/elpy/elpy/yapfutil.py", line 37, in fix_code
      raise Fault("Error during formatting: {}".format(e),
  elpy.rpc.Fault: Error during formatting: FormatCode() got an unexpected keyword argument 'verify'
  
  ======================================================================
  FAIL: test_should_complete_top_level_modules_for_import (tests.test_jedibackend.TestRPCGetCompletions.test_should_complete_top_level_modules_for_import)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/home/hoel/work/code-root/github.com/elpy/elpy/tests/support.py", line 382, in test_should_complete_top_level_modules_for_import
      self.assertEqual(sorted([cand['suffix'] for cand in completions]),
  AssertionError: Lists differ: ['dict', 'processing'] != ['processing']
  
  First differing element 0:
  'dict'
  'processing'
  
  First list contains 1 additional elements.
  First extra element 1:
  'processing'
  
  - ['dict', 'processing']
  ?  --------
  
  + ['processing']
  
  ======================================================================
  FAIL: test_should_get_oneline_docstring_for_modules (tests.test_jedibackend.TestRPCGetOnelineDocstring.test_should_get_oneline_docstring_for_modules)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/home/hoel/work/code-root/github.com/elpy/elpy/tests/support.py", line 842, in test_should_get_oneline_docstring_for_modules
      self.check_module_docstring(docstring)
    File "/home/hoel/work/code-root/github.com/elpy/elpy/tests/support.py", line 818, in check_module_docstring
      self.assertEqual(docstring['doc'],
  AssertionError: 'JSON[30 chars]<https://json.org> is a subset of JavaScript s[71 chars]mat.' != 'JSON[30 chars]<http://json.org> is a subset of JavaScript sy[70 chars]mat.'
  - JSON (JavaScript Object Notation) <https://json.org> is a subset of JavaScript syntax (ECMA-262 3rd edition) used as a lightweight data interchange format.
  ?                                        -
  + JSON (JavaScript Object Notation) <http://json.org> is a subset of JavaScript syntax (ECMA-262 3rd edition) used as a lightweight data interchange format.
  
  
  ----------------------------------------------------------------------
  Ran 317 tests in 18.319s
  
  FAILED (failures=2, errors=1)
  

None of these seems to be related to my changes, in fact I get exact these error messages with the latest upstream code.

For new features only:

• Tests has been added to cover the change
• The documentation has been updated

[finjulhich]

Would this still work with python versions < 3.12?

[gopar]

Would this still work with python versions < 3.12?

This is a good point. The PR doesn't seem like it'll work with versions < 3.12
PR will need to be updated.

Thanks!

[berhoel]

Would this still work with python versions < 3.12?

This is a good point. The PR doesn't seem like it'll work with versions < 3.12 PR will need to be updated.

Thanks!

My latest update for the patch addresses this by falling back to pkg_resources if importing packaging.version.Version fails.

[coveralls]

coverage: 90.96%. remained the same
when pulling 6a6655e on berhoel:master
into 7ff8ffa on jorgenschaefer:master.