Update tox to 4.0.16

[pyup-bot]

This PR updates tox from 3.19.0 to 4.0.16.

Changelog

3.28.0

--------------------

Features
^^^^^^^^

- Support provision of tox 4 with the ``min_version`` option - by :user:`hroncok`
`2661 <https://github.com/tox-dev/tox/issues/2661>`_

3.27.1

--------------------

Bugfixes
^^^^^^^^

- Replaced deprecated ``license_file`` key with ``license_files`` in ``setup.cfg`` -- by :user:`mgorny`.
`2521 <https://github.com/tox-dev/tox/issues/2521>`_
- Add env cleanup to envreport - fix PYTHONPATH leak into "envreport" -- by :user:`f3flight`.
`2528 <https://github.com/tox-dev/tox/issues/2528>`_

3.27.0

--------------------

Bugfixes
^^^^^^^^

- Dropped ``--build-option`` in isolated builds, an alternative fix for the ``SetuptoolsDeprecationWarning`` about using ``--global-option`` -- by :user:`adamchainz`
`2497 <https://github.com/tox-dev/tox/issues/2497>`_
- Remove read-only files in ``ensure_empty_dir``.
`2498 <https://github.com/tox-dev/tox/issues/2498>`_
- Multiple tox instances no longer clobber the ``.tox`` directory when
``provision_tox_env`` is used. - by :user:`masenf`
`2515 <https://github.com/tox-dev/tox/issues/2515>`_


Documentation
^^^^^^^^^^^^^

- Clarify that ``install_command`` only takes one command - by :user:`jugmac00`
`2433 <https://github.com/tox-dev/tox/issues/2433>`_
- Documented problems with plugin and provision env - by :user:`ziima`.
`2469 <https://github.com/tox-dev/tox/issues/2469>`_

3.26.0

--------------------

Bugfixes
^^^^^^^^

- Fix fallback to ``python`` environment when ``isolated_build = true`` is set -- by :user:`Unrud`
`2474 <https://github.com/tox-dev/tox/issues/2474>`_
- Fixed ``SetuptoolsDeprecationWarning`` about using ``--global-option`` -- by :user:`adamchainz`
`2478 <https://github.com/tox-dev/tox/issues/2478>`_


Features
^^^^^^^^

- Use ``tomllib`` on Python 3.11 or later and ``tomli`` instead of ``toml`` library on lower versions - by :user:`hroncok`.
`2463 <https://github.com/tox-dev/tox/issues/2463>`_

3.25.1

--------------------

Bugfixes
^^^^^^^^

- ``sitepackages = true`` will add user's site-package to the python path on Windows as expected -- by :user:`niander`
`2402 <https://github.com/tox-dev/tox/issues/2402>`_
- Avoid importing ``pipes`` on Python 3.3+ to avoid ``DeprecationWarning`` on Python 3.11 -- by :user:`adamchainz`
`2417 <https://github.com/tox-dev/tox/issues/2417>`_
- Fix ``isolated_build`` when the build process produces stderr at exit.
`2449 <https://github.com/tox-dev/tox/issues/2449>`_


Documentation
^^^^^^^^^^^^^

- Explain advantages of ``PIP_CONSTRAINT`` environment variable over ``--constraint`` argument.
`2423 <https://github.com/tox-dev/tox/issues/2423>`_

3.25.0

--------------------

Bugfixes
^^^^^^^^

- Fixed failing isolated_build because setuptools warning was captured
in ``build_requires``. -- by :user:`zariiii9003`
`2332 <https://github.com/tox-dev/tox/issues/2332>`_
- Avoid potential 30s delay caused by socket.getfqdn(). -- by :user:`ssbarnea`
`2375 <https://github.com/tox-dev/tox/issues/2375>`_


Features
^^^^^^^^

- Ignore missing commands if they are prefixed by ``-``
-- by :user:`cdown`.
`2315 <https://github.com/tox-dev/tox/issues/2315>`_
- Add default environment variables (such as http_proxy) regardless of their case to passenv on UNIX -- by :user:`poggenhans`.
`2372 <https://github.com/tox-dev/tox/issues/2372>`_
- On Windows ``PROGRAMFILES``, ``PROGRAMFILES(X86)``, and ``PROGRAMDATA`` environment variables are now passed through, unmasking system values necessary to locate resources such as a C compiler.
`2382 <https://github.com/tox-dev/tox/issues/2382>`_


Documentation
^^^^^^^^^^^^^

- Deleted the tox mailing list -- by :user:`jugmac00`
`2364 <https://github.com/tox-dev/tox/issues/2364>`_

3.24.5

--------------------

Bugfixes
^^^^^^^^

- Fixed an issue where ``usedevelop`` would cause an invocation error if setup.py does not exist. -- by :user:`VincentVanlaer`
`2197 <https://github.com/tox-dev/tox/issues/2197>`_

3.24.4

--------------------

Bugfixes
^^^^^^^^

- Fixed handling of ``-e ALL`` in parallel mode by ignoring the ``ALL`` in subprocesses -- by :user:`guahki`.
`2167 <https://github.com/tox-dev/tox/issues/2167>`_
- Prevent tox from using a truncated interpreter when using
``TOX_LIMITED_SHEBANG`` -- by :user:`jdknight`.
`2208 <https://github.com/tox-dev/tox/issues/2208>`_


Documentation
^^^^^^^^^^^^^

- Enabled the use of the favicon in the Sphinx docs first
introduced in :pull:`764` but not integrated fully
-- :user:`webknjaz`
`2177 <https://github.com/tox-dev/tox/issues/2177>`_

3.24.3

--------------------

Bugfixes
^^^^^^^^

- ``--parallel`` reports now show ASCII OK/FAIL/SKIP lines when full Unicode output is not available - by :user:`brettcs`
`1421 <https://github.com/tox-dev/tox/issues/1421>`_


Miscellaneous
^^^^^^^^^^^^^

- Started enforcing valid references in Sphinx docs -- :user:`webknjaz`
`2168 <https://github.com/tox-dev/tox/issues/2168>`_

3.24.2

--------------------

Bugfixes
^^^^^^^^

- include ``LC_ALL`` to implicit list of passenv variables - by :user:`ssbarnea`
`2162 <https://github.com/tox-dev/tox/issues/2162>`_

3.24.1

--------------------

Bugfixes
^^^^^^^^

- ``get_requires_for_build_sdist`` hook (PEP 517) is assumed to return an empty list if left unimplemented by the backend build system - by :user:`oczkoisse`
`2130 <https://github.com/tox-dev/tox/issues/2130>`_


Documentation
^^^^^^^^^^^^^

- The documentation of ``install_command`` now also mentions that you can provide arbitrary commands - by :user:`jugmac00`
`2081 <https://github.com/tox-dev/tox/issues/2081>`_

3.24.0

--------------------

Bugfixes
^^^^^^^^

- ``--devenv`` no longer modifies the directory in which the ``.tox`` environment is provisioned - by :user:`isaac-ped`
`2065 <https://github.com/tox-dev/tox/issues/2065>`_
- Fix show config when the package names are not in canonical form - by :user:`gaborbernat`.
`2103 <https://github.com/tox-dev/tox/issues/2103>`_


Documentation
^^^^^^^^^^^^^

- Extended environment variables section - by :user:`majiang`
`2036 <https://github.com/tox-dev/tox/issues/2036>`_


Miscellaneous
^^^^^^^^^^^^^

- ``tox`` no longer shows deprecation warnings for ``distutils.sysconfig`` on
Python 3.10 - by :user:`9999years`
`2100 <https://github.com/tox-dev/tox/issues/2100>`_

3.23.1

--------------------

Bugfixes
^^^^^^^^

- Distinguish between normal Windows Python and MSYS2 Python when looking for
virtualenv executable path.  Adds os.sep to :class:`~tox.interpreters.InterpreterInfo`
- by :user:`jschwartzentruber`
`1982 <https://github.com/tox-dev/tox/issues/1982>`_
- Fix a ``tox-conda`` isolation build bug - by :user:`AntoineD`.
`2056 <https://github.com/tox-dev/tox/issues/2056>`_


Documentation
^^^^^^^^^^^^^

- Update examples in the documentation to use ``setenv`` in the ``[testenv]`` sections, not wrongly in the ``[tox]`` main section.
- by :user:`AndreyNautilus`
`1999 <https://github.com/tox-dev/tox/issues/1999>`_


Miscellaneous
^^^^^^^^^^^^^

- Enable building tox with ``setuptools_scm`` 6+ by :user:`hroncok`
`1984 <https://github.com/tox-dev/tox/issues/1984>`_

3.23.0

--------------------

Features
^^^^^^^^

- tox can now be invoked with a new ``--no-provision`` flag that prevents provision,
if :conf:`requires` or :conf:`minversion` are not satisfied,
tox will fail;
if a path is specified as an argument to the flag
(e.g. as ``tox --no-provision missing.json``) and provision is prevented,
provision metadata are written as JSON to that path - by :user:`hroncok`
`1921 <https://github.com/tox-dev/tox/issues/1921>`_
- Unicode support in ``pyproject.toml`` - by :user:`domdfcoding`
`1940 <https://github.com/tox-dev/tox/issues/1940>`_

3.22.0

--------------------

Features
^^^^^^^^

- The value of the :conf:`requires` configuration option is now exposed via
the :class:`tox.config.Config` object - by :user:`hroncok`
`1918 <https://github.com/tox-dev/tox/issues/1918>`_

3.21.4

--------------------

Bugfixes
^^^^^^^^

- Adapt tests not to assume the ``easy_install`` command exists, as it was removed from ``setuptools`` 52.0.0+ - by :user:`hroncok`
`1893 <https://github.com/tox-dev/tox/issues/1893>`_

3.21.3

--------------------

Bugfixes
^^^^^^^^

- Fix a killed tox (via SIGTERM) leaving the commands subprocesses running
by handling it as if it were a KeyboardInterrupt - by :user:`dajose`
`1772 <https://github.com/tox-dev/tox/issues/1772>`_

3.21.2

--------------------

Bugfixes
^^^^^^^^

- Newer coverage tools update the ``COV_CORE_CONTEXT`` environment variable, add it to the list of environment variables
that can change in our pytest plugin - by :user:`gaborbernat`.
`1854 <https://github.com/tox-dev/tox/issues/1854>`_

3.21.1

--------------------

Bugfixes
^^^^^^^^

- Fix regression that broke using install_command in config replacements - by :user:`jayvdb`
`1777 <https://github.com/tox-dev/tox/issues/1777>`_
- Fix regression parsing posargs default containing colon. - by :user:`jayvdb`
`1785 <https://github.com/tox-dev/tox/issues/1785>`_


Features
^^^^^^^^

- Prevent .tox in envlist - by :user:`jayvdb`
`1684 <https://github.com/tox-dev/tox/issues/1684>`_


Miscellaneous
^^^^^^^^^^^^^

- Enable building tox with ``setuptools_scm`` 4 and 5 by :user:`hroncok`
`1799 <https://github.com/tox-dev/tox/issues/1799>`_

3.21.0

--------------------

Bugfixes
^^^^^^^^

- Fix the false ``congratulations`` message that appears when a ``KeyboardInterrupt`` occurs during package installation. - by :user:`gnikonorov`
`1453 <https://github.com/tox-dev/tox/issues/1453>`_
- Fix ``platform`` support for ``install_command``. - by :user:`jayvdb`
`1464 <https://github.com/tox-dev/tox/issues/1464>`_
- Fixed regression in v3.20.0 that caused escaped curly braces in setenv
to break usage of the variable elsewhere in tox.ini. - by :user:`jayvdb`
`1690 <https://github.com/tox-dev/tox/issues/1690>`_
- Prevent ``{}`` and require ``{:`` is only followed by ``}``. - by :user:`jayvdb`
`1711 <https://github.com/tox-dev/tox/issues/1711>`_
- Raise ``MissingSubstitution`` on access of broken ini setting. - by :user:`jayvdb`
`1716 <https://github.com/tox-dev/tox/issues/1716>`_


Features
^^^^^^^^

- Allow \{ and \} in default of {env:key:default}. - by :user:`jayvdb`
`1502 <https://github.com/tox-dev/tox/issues/1502>`_
- Allow {posargs} in setenv. - by :user:`jayvdb`
`1695 <https://github.com/tox-dev/tox/issues/1695>`_
- Allow {/} to refer to os.sep. - by :user:`jayvdb`
`1700 <https://github.com/tox-dev/tox/issues/1700>`_
- Make parsing [testenv] sections in setup.cfg official. - by :user:`mauvilsa`
`1727 <https://github.com/tox-dev/tox/issues/1727>`_
- Relax importlib requirement to allow 3.0.0 or any newer version - by
:user:`pkolbus`
`1763 <https://github.com/tox-dev/tox/issues/1763>`_


Documentation
^^^^^^^^^^^^^

- Document more info about using ``platform`` setting. - by :user:`prakhargurunani`
`1144 <https://github.com/tox-dev/tox/issues/1144>`_
- Replace ``indexserver`` in documentation with environment variables - by :user:`ziima`.
`1357 <https://github.com/tox-dev/tox/issues/1357>`_
- Document that the ``passenv`` environment setting is case insensitive. - by :user:`gnikonorov`
`1534 <https://github.com/tox-dev/tox/issues/1534>`_

3.20.1

--------------------

Bugfixes
^^^^^^^^

- Relax importlib requirement to allow version<3 - by :user:`usamasadiq`
`1682 <https://github.com/tox-dev/tox/issues/1682>`_

3.20.0

--------------------

Bugfixes
^^^^^^^^

- Allow hyphens and empty factors in generative section name. - by :user:`tyagdit`
`1636 <https://github.com/tox-dev/tox/issues/1636>`_
- Support for PEP517 in-tree build backend-path key in ``get-build-requires``. - by :user:`nizox`
`1654 <https://github.com/tox-dev/tox/issues/1654>`_
- Allow escaping curly braces in setenv. - by :user:`mkenigs`
`1656 <https://github.com/tox-dev/tox/issues/1656>`_


Features
^^^^^^^^

- Support for comments within ``setenv`` and environment files via the ``files|`` prefix. - by :user:`gaborbernat`
`1667 <https://github.com/tox-dev/tox/issues/1667>`_

Links

• PyPI: https://pypi.org/project/tox
• Changelog: https://pyup.io/changelogs/tox/

[pyup-bot]

Closing this in favor of #395