⬆️ Update dependency testfixtures to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
testfixtures	==8.3.0 -> ==9.1.0

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Release Notes

Simplistix/testfixtures (testfixtures)

v9.1.0

Compare Source

• Add support for passing :class:StringComparison instances as parameters to
  :meth:OutputCapture.compare.

v9.0.1

Compare Source

• :attr:ShouldRaise.raised is now always an exception instance. If no exception has been raised,
  it will be a :class:~testfixtures.shouldraise.NoException instance. This prevents typing
  complaints around using an attribute that might be None.

• :func:mock_time has been reworked to return an instance of :class:~testfixtures.datetime.MockTime rather than the
  class itself. :class:~testfixtures.datetime.MockTime has also been reworked such that it can no longer be instantiated
  with the same parameters as :class:~datetime.datetime - this edge case was never supported,
  but is highlighted here in case folks were using it.

v9.0.0

Compare Source

• Python 3.11 is now the minimum supported version.

• A show_whitespace parameter has been added to :class:ShouldAssert.

• testfixtures is now fully typed, checked with mypy__ and is distributed with
  a py.typed marker file.

  __ https://mypy.readthedocs.io/en/stable/

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.68%. Comparing base (688f522) to head (edbcdef).
⚠️ Report is 9 commits behind head on dev.
✅ All tests successful. No failed tests found.

❌ Your project status has failed because the head coverage (99.71%) is below the target coverage (100.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1053   +/-   ##
=======================================
  Coverage   93.68%   93.68%           
=======================================
  Files         130      130           
  Lines        4974     4974           
  Branches      327      327           
=======================================
  Hits         4660     4660           
  Misses        251      251           
  Partials       63       63           

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[codspeed-hq]

CodSpeed Performance Report

Merging #1053 will not alter performance

_{Comparing renovate/testfixtures-9.x (edbcdef) with dev (688f522)}

Summary

✅ 6 untouched benchmarks