Bump tox from 4.26.0 to 4.30.1 in /requirements

[dependabot]

Bumps tox from 4.26.0 to 4.30.1.

Release notes

Sourced from tox's releases.

4.30.1

What's Changed

• Prevent Tox from hanging with --installpkg sdist due to orphaned build backend by @​vytas7 in tox-dev/tox#3530

New Contributors

• @​vytas7 made their first contribution in tox-dev/tox#3530

Full Changelog: tox-dev/tox@4.30.0...4.30.1

4.30.0

What's Changed

• Pass through CI as __TOX_ENVIRONMENT_VARIABLE_ORIGINAL_CI by @​Liam-DeVoe in tox-dev/tox#3592
• [pre-commit.ci] pre-commit autoupdate by @​pre-commit-ci[bot] in tox-dev/tox#3596
• Fix the built docs HTML path hint in tox.toml by @​webknjaz in tox-dev/tox#3594
• Add a "version added" note for tox_extend_envs by @​webknjaz in tox-dev/tox#3595
• fix: provide clear messaging about config file loading by @​ssbarnea in tox-dev/tox#3578
• Ensure tox_extend_envs list can be read twice by @​webknjaz in tox-dev/tox#3598

New Contributors

• @​Liam-DeVoe made their first contribution in tox-dev/tox#3592

Full Changelog: tox-dev/tox@4.29.0...4.30.0

4.29.0

What's Changed

• Docs: environment variables contain strings by @​hroncok in tox-dev/tox#3575
• 🐍 Fix sys_platform Fixture Leakage breaking the CI by @​gaborbernat in tox-dev/tox#3589
• Expose a new tox_extend_envs hook in plugins API by @​webknjaz in tox-dev/tox#3591

Full Changelog: tox-dev/tox@4.28.4...4.29.0

4.28.4

What's Changed

• [pre-commit.ci] pre-commit autoupdate by @​pre-commit-ci[bot] in tox-dev/tox#3570
• Pass ssh-agent variables by default by @​daniilgankov in tox-dev/tox#3572

New Contributors

• @​daniilgankov made their first contribution in tox-dev/tox#3572

Full Changelog: tox-dev/tox@4.28.3...4.28.4

... (truncated)

Changelog

Sourced from tox's changelog.

v4.30.1 (2025-09-03)

Bugfixes - 4.30.1

- Prevent tox from hanging upon exit due to orphaned build threads and subprocesses when the ``--installpkg`` option is
  used with *sdist*.
  - by :user:`vytas7` (:issue:`3530`)
v4.30.0 (2025-09-03)
Features - 4.30.0

• Add __TOX_ENVIRONMENT_VARIABLE_ORIGINAL_CI, which passes through the CI variable if present. This is intended for use by other libraries to detect if tox is running under CI. (:issue:3442)

Bugfixes - 4.30.0

- Makes the error message more clear when pyproject.toml file cannot be loaded
  or is missing expected keys. (:issue:`3578`)
- The :func:`tox_extend_envs() hook <tox.plugin.spec.tox_extend_envs>`
  recently added in :pull:`3591` turned out to not work well with
  ``tox run``. It was fixed internally, not to exhaust the underlying
  iterator on the first use.
-- by :user:webknjaz (:issue:3598)
v4.29.0 (2025-08-29)
Features - 4.29.0

• A new tox life cycle event is now exposed for use via :doc:Plugins API </plugins> -- by :user:webknjaz.

  The corresponding hook point is :func:tox_extend_envs <tox.plugin.spec.tox_extend_envs>. It allows plugin authors to declare ephemeral environments that they can then populate through the in-memory configuration loader interface.

  This patch was made possible thanks to pair programming with :user:gaborbernat at PyCon US 2025. (:issue:3510, :issue:3591)

v4.28.4 (2025-07-31)

Features - 4.28.4

- Pass ssh-agent variables ``SSH_AGENT_PID`` and ``SSH_AUTH_SOCK`` in ``pass_env`` by default.
  - by :user:`daniilgankov` (:issue:`3572`)
</tr></table> 

... (truncated)

Commits

• b33a43c release 4.30.1
• 9ea1c32 Prevent Tox from hanging with --installpkg sdist due to orphaned build back...
• aa90652 release 4.30.0
• 48fecab Ensure tox_extend_envs list can be read twice (#3598)
• 0b8f66f fix: provide clear messaging about config file loading (#3578)
• adf0997 Add a "version added" note for tox_extend_envs (#3595)
• 732a308 Fix the built docs HTML path hint in tox.toml (#3594)
• 5493ba0 [pre-commit.ci] pre-commit autoupdate (#3596)
• e911788 pass through CI as __TOX_ENVIRONMENT_VARIABLE_ORIGINAL_CI (#3592)
• 59aaee9 release 4.29.0
• Additional commits viewable in compare view

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