Update dependency python-dateutil to <2.8.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
python-dateutil	<2.8.2 -> <2.8.3

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Release Notes

dateutil/dateutil

v2.8.2

Compare Source

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).

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