chore(deps): update dependency pyfakefs to v5.9.3

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This PR contains the following updates:

Package	Change	Age	Confidence
pyfakefs (changelog)	==5.9.1 -> ==5.9.3

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Release Notes

pytest-dev/pyfakefs (pyfakefs)

v5.9.3

Compare Source

Fixes a utility method.

Changes

• a warning is now issued if trying to create a nested fake filesystem with custom arguments
  (custom arguments are ignored in this case, as the existing fake filesystem is used)

Fixes

• fixed fake_filesystem.add_package_metadata that had never worked correctly
  (see #​1205)

Infrastructure

• updated the package build-system minimum version to setuptools v61.2 and higher

v5.9.2

Compare Source

Fixes interaction with pytest.

Fixes

• fixed an interaction problem of fs with other pytest fixtures (see #​1200)

Infrastructure

• fixed some warnings in tests (see #​1190)

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