Bump pip from 20.0.2 to 21.2.1

[dependabot-preview]

Bumps pip from 20.0.2 to 21.2.1.

Changelog

Sourced from pip's changelog.

21.2.1 (2021-07-25)

Process

• The source distribution re-installation feature removal has been delayed to 21.3.

21.2 (2021-07-24)

Process

• pip freeze, pip list, and pip show no longer normalize underscore (_) in distribution names to dash (-). This is a side effect of the migration to importlib.metadata, since the underscore-dash normalization behavior is non-standard and specific to setuptools. This should not affect other parts of pip (for example, when feeding the pip freeze result back into pip install) since pip internally performs standard PEP 503 normalization independently to setuptools.

Deprecations and Removals

• Git version parsing is now done with regular expression to prepare for the pending upstream removal of non-PEP-440 version parsing logic. (#10117)
• Re-enable the "Value for ... does not match" location warnings to field a new round of feedback for the distutils-sysconfig transition. (#10151)
• Remove deprecated --find-links option in pip freeze (#9069)

Features

• New resolver: Loosen URL comparison logic when checking for direct URL reference equivalency. The logic includes the following notable characteristics:

  • The authentication part of the URL is explicitly ignored.
  • Most of the fragment part, including egg=, is explicitly ignored. Only subdirectory= and hash values (e.g. sha256=) are kept.

  * The query part of the URL is parsed to allow ordering differences. (#10002)

• Support TOML v1.0.0 syntax in pyproject.toml. (#10034)

• Added a warning message for errors caused due to Long Paths being disabled on Windows. (#10045)

• Change the encoding of log file from default text encoding to UTF-8. (#10071)

• Log the resolved commit SHA when installing a package from a Git repository. (#10149)

• Add a warning when passing an invalid requirement to pip uninstall. (#4958)

• Add new subcommand pip index used to interact with indexes, and implement pip index version to list available versions of a package. (#7975)

• When pip is asked to uninstall a project without the dist-info/RECORD file it will no longer traceback with FileNotFoundError, but it will provide a better error message instead, such as:

  ERROR: Cannot uninstall foobar 0.1, RECORD file not found. You might be able to recover from this via: 'pip install --force-reinstall --no-deps foobar==0.1'.
  

  When dist-info/INSTALLER is present and contains some useful information, the info is included in the error message instead:

  ERROR: Cannot uninstall foobar 0.1, RECORD file not found. Hint: The package was installed by rpm.
  

  (#8954)

• Add an additional level of verbosity. --verbose (and the shorthand -v) now contains significantly less output, and users that need complete full debug-level output should pass it twice (--verbose --verbose or -vv). (#9450)

• New resolver: The order of dependencies resolution has been tweaked to traverse the dependency graph in a more breadth-first approach. (#9455)

• Make "yes" the default choice in pip uninstall's prompt. (#9686)

... (truncated)

Commits

• bd41229 Bump for release
• 765a4b4 Bump for development
• 3d25c53 Bump for release
• 27b9a9c Update AUTHORS.txt
• b9dbab2 Merge pull request #10199 from uranusjr/remove-local-sdist-reinstall
• 33b7f0c Remove deprecated sdist reinstall feature for 21.2
• a8b8d4d Document how to install provides_extras from local wheel file (#9698)
• 239a307 Error handling upon uninstall invalid parameter (#10171)
• 5e86264 Merge pull request #10189 from harupy/type-annotations-index-models
• 02b1855 Merge pull request #10188 from harupy/type-annotations-req
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Pull request limits (per update run and/or open at any time)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

[dependabot-preview]

Superseded by #639.