build(deps): bump packaging from 19.1 to 20.4

[dependabot-preview]

Bumps packaging from 19.1 to 20.4.

Release notes

Sourced from packaging's releases.

20.1

• Fix a bug caused by reuse of an exhausted iterator. (#257)

20.0

• Add type hints (:issue:191)

• Add proper trove classifiers for PyPy support (:issue:198)

• Scale back depending on ctypes for manylinux support detection (:issue:171)

• Use sys.implementation.name where appropriate for packaging.tags (:issue:193)

• Expand upon the API provded by packaging.tags: interpreter_name(), mac_platforms(), compatible_tags(), cpython_tags(), generic_tags() (:issue:187)

• Officially support Python 3.8 (:issue:232)

• Add major, minor, and micro aliases to packaging.version.Version (:issue:226)

• Properly mark packaging has being fully typed by adding a py.typed file (:issue:226)

19.2

No release notes provided.

Changelog

Sourced from packaging's changelog.

20.4 - 2020-05-19

• Canonicalize version before comparing specifiers. (282)
• Change type hint for canonicalize_name to return packaging.utils.NormalizedName. This enables the use of static typing tools (like mypy) to detect mixing of normalized and un-normalized names.

20.3 - 2020-03-05

• Fix changelog for 20.2.

20.2 - 2020-03-05

• Fix a bug that caused a 32-bit OS that runs on a 64-bit ARM CPU (e.g. ARM-v8, aarch64), to report the wrong bitness.

20.1 - 2020-01-24

• Fix a bug caused by reuse of an exhausted iterator. (257)

20.0 - 2020-01-06

• Add type hints (191)
• Add proper trove classifiers for PyPy support (198)
• Scale back depending on ctypes for manylinux support detection (171)
• Use sys.implementation.name where appropriate for packaging.tags (193)
• Expand upon the API provded by packaging.tags: interpreter_name(), mac_platforms(), compatible_tags(), cpython_tags(), generic_tags() (187)
• Officially support Python 3.8 (232)
• Add major, minor, and micro aliases to packaging.version.Version (226)
• Properly mark packaging has being fully typed by adding a py.typed file (226)

19.2 - 2019-09-18

• Remove dependency on attrs (178, 179)
• Use appropriate fallbacks for CPython ABI tag (181, 185)
• Add manylinux2014 support (186)
• Improve ABI detection (181)
• Properly handle debug wheels for Python 3.8 (172)
• Improve detection of debug builds on Windows (194)

Commits

• ded06ce Bump for release
• db291c7 Fix LEQ/GEQ for SpecifierSets when considering versions with a local version ...
• fbe5144 Pass positional args to pytest invocation (#301)
• d2e29ed Rename GitHub Actions tasks (#298)
• 221443a Document version classes comparison behaviour (#297)
• 61672bf Add a NewType for normalized names (#292)
• 9731c00 Document major, minor and macro attributes of Version (#285)
• a9f31ee Use SPDX identifiers for license metadata (#289)
• ed0a58f specifiers: don't rely on hashes for equality (#284)
• 20a9a33 Canonicalize version before comparing specifiers (#283)
• Additional commits viewable in compare view

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