Update tox requirement from <4.4,>=3.20 to >=3.20,<4.5

[dependabot]

Updates the requirements on tox to permit the latest version.

Release notes

Sourced from tox's releases.

4.4.2

What's Changed

• rename TOX_CONFIG_FILE to TOX_USER_CONFIG_FILE by @​masenf in tox-dev/tox#2896

Full Changelog: tox-dev/tox@4.4.1...4.4.2

Changelog

Sourced from tox's changelog.

v4.4.2 (2023-01-25)

Bugfixes - 4.4.2

- Allow the user configuration file (default ``<appdir>/tox/config.ini``) to be overridden via the
  ``TOX_USER_CONFIG_FILE`` environment variable. Previously tox was looking at the ``TOX_CONFIG_FILE`` to override the
  user configuration, however that environment variable is already used to override the main configuration - by
  :user:`masenf`. (:issue:`2890`)
v4.4.1 (2023-01-25)
Bugfixes - 4.4.1

• In tox 4.4.0 constrain_package_deps was introduced with a default value of True. This has been changed back to False, which restores the original behavior of tox 4.3.5 - by :user:masenf. (:issue:2897)

v4.4.0 (2023-01-25)

Features - 4.4.0

- Test environments now recognize boolean config keys ``constrain_package_deps`` (default=true) and ``use_frozen_constraints`` (default=false),
  which control how tox generates and applies constraints files when performing ``install_package_deps``.
If constrain_package_deps is true (default), then tox will write out {env_dir}{/}constraints.txt and pass it to
pip during install_package_deps. If use_frozen_constraints is false (default), the constraints will be taken
from the specifications listed under deps (and inside any requirements or constraints file referenced in deps).
Otherwise, list_dependencies_command (pip freeze) is used to enumerate exact package specifications which will
be written to the constraints file.
In previous releases, conflicting package dependencies would silently override the deps named in the configuration,
resulting in test runs against unexpected dependency versions, particularly when using tox factors to explicitly test
with different versions of dependencies - by :user:masenf. (:issue:2386)
Bugfixes - 4.4.0

• When parsing command lines, use shlex(..., posix=True), even on windows platforms, since non-POSIX mode does not handle escape characters and quoting like a shell would. This improves cross-platform configurations without hacks or esoteric quoting.

  To make this transition easier, on Windows, the backslash path separator will not treated as an escape character unless it preceeds a quote, whitespace, or another backslash chracter. This allows paths to mostly be written in single or double backslash style.

  Note that double-backslash will no longer be escaped to a single backslash in substitutions, instead the double backslash will be consumed as part of command splitting, on either posix or windows platforms.

... (truncated)

Commits

• 402cf84 release 4.4.2
• ed39bd7 rename TOX_CONFIG_FILE to TOX_USER_CONFIG_FILE (#2896)
• b654be7 release 4.4.1
• 8155760 pip_install: constrain_package_deps is now False by default (#2899)
• e29217a release 4.4.0
• ea12bf4 Windows shlex fix (#2895)
• 8736549 Enforce constraints during install_package_deps (#2888)
• d291752 [pre-commit.ci] pre-commit autoupdate (#2889)
• 7753e72 Add more explanation to list_dependencies_command configuration option (#2883)
• 7eec025 release 4.3.5
• Additional commits viewable in compare view

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