Ignore DeprecationWarning caused by dateutil

[hugovk]

Before:

================================================================== warnings summary ==================================================================
../../../../Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/dateutil/tz/tz.py:37
  /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/dateutil/tz/tz.py:37: DeprecationWarning: datetime.datetime.utcfromtimestamp() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.fromtimestamp(timestamp, datetime.UTC).
    EPOCH = datetime.datetime.utcfromtimestamp(0)

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
===================================================== 548 passed, 23 skipped, 1 warning in 1.03s =====================================================

After:

========================================================== 548 passed, 23 skipped in 1.05s ===========================================================

This was fixed in dateutil in June: dateutil/dateutil#1285

We're just waiting for the next release: dateutil/dateutil#1314

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d9f163a) 99.19% compared to head (2b37be5) 99.19%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #163   +/-   ##
=======================================
  Coverage   99.19%   99.19%           
=======================================
  Files           9        9           
  Lines         746      746           
=======================================
  Hits          740      740           
  Misses          6        6           

Flag	Coverage Δ
macos-latest	97.58% <ø> (ø)
ubuntu-latest	97.58% <ø> (ø)
windows-latest	96.11% <ø> (ø)

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