Packvers

~~~~~~~~~~~~~~~~~

* Renaming to packvers to avoid confusion

~~~~~~~~~~~~~~~~~

* Fork of v21.3 to packaging2 as a workaround of https://github.com/pypa/packaging/issues/530
and reinstate support for LegacyVersion and LegacySpecifier

~~~~~~~~~~~~~~~~~

* Add a ``pp3-none-any`` tag (`311 <https://github.com/pypa/packaging/issues/311>`__)
* Replace the blank pyparsing 3 exclusion with a 3.0.5 exclusion (`481 <https://github.com/pypa/packaging/issues/481>`__, `#486 <https://github.com/pypa/packaging/issues/486>`__)
* Fix a spelling mistake (`479 <https://github.com/pypa/packaging/issues/479>`__)

~~~~~~~~~~~~~~~~~

* Update documentation entry for 21.1.

~~~~~~~~~~~~~~~~~

* Update pin to pyparsing to exclude 3.0.0.

~~~~~~~~~~~~~~~~~

* PEP 656: musllinux support (`411 <https://github.com/pypa/packaging/issues/411>`__)
* Drop support for Python 2.7, Python 3.4 and Python 3.5.
* Replace distutils usage with sysconfig (`396 <https://github.com/pypa/packaging/issues/396>`__)
* Add support for zip files in ``parse_sdist_filename`` (`429 <https://github.com/pypa/packaging/issues/429>`__)
* Use cached ``_hash`` attribute to short-circuit tag equality comparisons (`417 <https://github.com/pypa/packaging/issues/417>`__)
* Specify the default value for the ``specifier`` argument to ``SpecifierSet`` (`437 <https://github.com/pypa/packaging/issues/437>`__)
* Proper keyword-only "warn" argument in packaging.tags (`403 <https://github.com/pypa/packaging/issues/403>`__)
* Correctly remove prerelease suffixes from ~= check (`366 <https://github.com/pypa/packaging/issues/366>`__)
* Fix type hints for ``Version.post`` and ``Version.dev`` (`393 <https://github.com/pypa/packaging/issues/393>`__)
* Use typing alias ``UnparsedVersion`` (`398 <https://github.com/pypa/packaging/issues/398>`__)
* Improve type inference for ``packaging.specifiers.filter()`` (`430 <https://github.com/pypa/packaging/issues/430>`__)
* Tighten the return type of ``canonicalize_version()`` (`402 <https://github.com/pypa/packaging/issues/402>`__)