python3-dateutil: Update to version 2.8.2 and python-3.10

python3-dateutil: Update to version 2.8.2 and python-3.10

- Update from 2.8.1 to 2.8.2
- Update of rootfile
- Changelog
Version 2.8.2 (2021-07-08)
Data updates
- Updated tzdata version to 2021a. (gh pr #1128)
Bugfixes
- Fixed a bug in the parser where non-``ValueError`` exceptions would be raised
  during exception handling; this would happen, for example, if an
  ``IllegalMonthError`` was raised in ``dateutil`` code. Fixed by Mark Bailey.
  (gh issue #981, pr #987).
- Fixed the custom ``repr`` for ``dateutil.parser.ParserError``, which was not
  defined due to an indentation error. (gh issue #991, gh pr #993)
- Fixed a bug that caused ``b'`` prefixes to appear in parse_isodate exception
  messages. Reported and fixed by Paul Brown (@pawl) (gh pr #1122)
- Make ``isoparse`` raise when trying to parse times with inconsistent use of
  `:` separator. Reported and fixed by @mariocj89 (gh pr #1125).
- Fixed ``tz.gettz()`` not returning local time when passed an empty string.
  Reported by @labrys (gh issues #925, #926). Fixed by @ffe4 (gh pr #1024)
Documentation changes
- Rearranged parser documentation into "Functions", "Classes" and "Warnings and
  Exceptions" categories. (gh issue #992, pr #994).
- Updated ``parser.parse`` documentation to reflect the switch from
  ``ValueError`` to ``ParserError``. (gh issue #992, pr #994).
- Fixed methods in the ``rrule`` module not being displayed in the docs. (gh pr
  #1025)
- Changed some relative links in the exercise documentation to refer to the
  document locations in the input tree, rather than the generated HTML files in
  the HTML output tree (which presumably will not exist in non-HTML output
  formats). (gh pr #1078).
Misc
- Moved ``test_imports.py``, ``test_internals.py`` and ``test_utils.py`` to
  pytest.  Reported and fixed by @jpurviance (gh pr #978)
- Added project_urls for documentation and source. Patch by @andriyor (gh pr
  #975).
- Simplified handling of bytes and bytearray in ``_parser._timelex``. Reported
  and fixed by @frenzymadness (gh issue #1060).
- Changed the tests against the upstream tz database to always generate fat
  binaries, since until GH-590 and GH-1059 are resolved, "slim" zic binaries
  will cause problems in many zones, causing the tests to fail. This also
  updates ``zoneinfo.rebuild`` to always generate fat binaries. (gh pr #1076).
- Moved sdist and wheel generation to use `python-build`. Reported and fixed by
  @mariocj89 (gh pr #1133).

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>