chore(deps): update pyfakefs requirement from <=5.6.0,>=4.5.3 to >=4.5.3,<=6.1.6

[dependabot]

Updates the requirements on pyfakefs to permit the latest version.

Release notes

Sourced from pyfakefs's releases.

pyfakefs release version 6.1.6

Follow-up bugfix release for release 6.1.5.

Changelog

Sourced from pyfakefs's changelog.

Version 6.1.6 (2026-03-18)

Follow-up bugfix release for 6.1.5.

Fixes

• os.path.realpath did not correctly handle some absolute paths under Windows (previous fix was incomplete, see #1296)

Version 6.1.5 (2026-03-15)

Minor bugfix release.

Fixes

• os.path.realpath did not resolve symlinks under Windows (see #1296)

Version 6.1.4 (2026-03-04)

Fixes incompatibility with VCCode unittest runner.

Fixes

• expanduser now correctly handles paths besides home and different separators (see #1289)
• avoid faking filesystem in VSCode unittest runner (see #1285)

Version 6.1.3 (2026-03-01)

Minor bugfix release.

Fixes

• handle expanduser() and home() correctly in cross OS usage (see #1289)

Version 6.1.2 (2026-02-22)

Fixes a regression caused by the introduced weakrefs.

Fixes

• do not use weakrefs for filesystem objects in fake modules (see #1284)

Version 6.1.1 (2026-02-09)

Fixes a packaging issue in latest version.

Fixes

• fixed packaging issue: tests had not been added to sdist (see #1278)

Version 6.1.0 (2026-02-06)

Changes back-link references to weak references.

Changes

• added more support for PyPy 3
• Caution: many back-link references have been replaced by weak references;

... (truncated)

Commits

• 07a6c45 Release 6.1.6
• 618b94a Fix os.path.realpath with absolute path (Windows)
• 2ea3a13 [pre-commit.ci] pre-commit autoupdate
• a4feba2 Release 6.1.5
• 0847d29 Fix os.path.realpath symlink handling under Windows
• 1b11cfa [pre-commit.ci] pre-commit autoupdate
• eceb589 Minor documentation update
• 3309aa9 Release 6.1.4
• e8cc3a9 [pre-commit.ci] pre-commit autoupdate
• 6b4d590 Avoid faking fs in VSCode unittest runner
• Additional commits viewable in compare view