20.3.3 (2020-12-15)
===================
Bug Fixes
---------
- Revert "Skip candidate not providing valid metadata", as that caused pip to be overeager about downloading from the package index.
20.3.2 (2020-12-15)
===================
Features
--------
- New resolver: Resolve direct and pinned (``==`` or ``===``) requirements first
to improve resolver performance.
- Add a mechanism to delay resolving certain packages, and use it for setuptools.
Bug Fixes
---------
- New resolver: The "Requirement already satisfied" log is not printed only once
for each package during resolution.
- Fix crash when logic for redacting authentication information from URLs
in ``--help`` is given a list of strings, instead of a single string.
- New resolver: Correctly implement PEP 592. Do not return yanked versions from
an index, unless the version range can only be satisfied by yanked candidates.
- New resolver: Make constraints also apply to package variants with extras, so
the resolver correctly avoids backtracking on them.
- New resolver: Discard a candidate if it fails to provide metadata from source,
or if the provided metadata is inconsistent, instead of quitting outright.
Vendored Libraries
------------------
- Update vendoring to 20.8
Improved Documentation
----------------------
- Update documentation to reflect that pip still uses legacy resolver by default in Python 2 environments.
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