Update tox requirement from <4.7,>=3.20 to >=3.20,<4.11

[dependabot[bot]]

Updates the requirements on tox to permit the latest version.

Changelog

Sourced from tox's changelog.

v4.10.0 (2023-08-21)

Features - 4.10.0

- Change accepted environment name rule: must be made up of factors defined in configuration or match regex
  ``(pypy|py|cython|)((\d(\.\d+(\.\d+)?)?)|\d+)?``. If an environment name does not match this fail, and if a close match
  found suggest that to the user. (:issue:`3099`)
Bugfixes - 4.10.0

• --override foo+=bar appending syntax will now work correctly when foo wasn't defined in tox.ini. (:issue:3100)

v4.9.0 (2023-08-16)

Features - 4.9.0

- Disallow command line environments which are not explicitly specified in the config file - by :user:`tjsmart`. (:issue:`2858`)
v4.8.0 (2023-08-12)
Features - 4.8.0

• --override can now take options in the form of foo+=bar which will append bar to the end of an existing list/dict, rather than replacing it. (:issue:3087)

v4.7.0 (2023-08-08)

Features - 4.7.0

- Make --hashseed default to PYTHONHASHSEED, if defined - by :user:`paravoid`.
  The main motivation for this is to able to set the hash seed when building the
  documentation with "tox -e docs", and thus avoid embedding a random value in
  the tox documentation for --help. This caused documentation builds to fail to
  build reproducibly. (:issue:`2942`)
Bugfixes - 4.7.0

• Update a regular expression in tests to match the exception message in both Python 3.12 and older. (:issue:3065)

Improved Documentation - 4.7.0

- Fix broken links - by :user:`gaborbernat`. (:issue:`3072`)
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Commits

• 9ceec6e release 4.10.0
• 1024592 Accept environments with defined factors or of python selector form - suggest...
• 6b8e83a Replace undefined settings with overrides when appending (#3101)
• 0ac7121 Update README.md
• 29b5e42 Document release process (#3094)
• 2c4a745 Set basepython for docs env in alignment to Read the Docs default (#3097)
• 3627f11 release 4.9.0
• 6ca8d9b [pre-commit.ci] pre-commit autoupdate (#3091)
• 2124458 Disallow command line environments which are not explicitly specified in the ...
• f516cb5 release 4.8.0
• Additional commits viewable in compare view

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Superseded by #159.