Bump pip from 18.0 to 25.2 in /tests/python2-libraries

[dependabot]

Bumps pip from 18.0 to 25.2.

Changelog

Sourced from pip's changelog.

25.2 (2025-07-30)

Features

• Declare support for Python 3.14 ([#13506](https://github.com/pypa/pip/issues/13506) <https://github.com/pypa/pip/issues/13506>_)
• Automatic download resumption and retrying is enabled by default. ([#13464](https://github.com/pypa/pip/issues/13464) <https://github.com/pypa/pip/issues/13464>_)
• Requires-Python error message displays version clauses in numerical order. ([#13367](https://github.com/pypa/pip/issues/13367) <https://github.com/pypa/pip/issues/13367>_)
• Minor performance improvement getting the order to install a very large number of interdependent packages. ([#13424](https://github.com/pypa/pip/issues/13424) <https://github.com/pypa/pip/issues/13424>_)
• Show time taken instead of eta 0:00:00 at download completion. ([#13483](https://github.com/pypa/pip/issues/13483) <https://github.com/pypa/pip/issues/13483>_)
• Speed up small CLI tools by removing import re from the console script executable template. ([#13165](https://github.com/pypa/pip/issues/13165) <https://github.com/pypa/pip/issues/13165>_)
• Remove warning when cloning from a Git reference that does not look like a commit hash. ([#12283](https://github.com/pypa/pip/issues/12283) <https://github.com/pypa/pip/issues/12283>_)

Bug Fixes

• pip config debug now correctly separates options as set by the different files at the same level. ([#12099](https://github.com/pypa/pip/issues/12099) <https://github.com/pypa/pip/issues/12099>_)

• Ensure truststore feature remains active even when a proxy is also in use. ([#13343](https://github.com/pypa/pip/issues/13343) <https://github.com/pypa/pip/issues/13343>_)

• Include sub-commands in tab completion. ([#13140](https://github.com/pypa/pip/issues/13140) <https://github.com/pypa/pip/issues/13140>_)

• pip list with the json or freeze format enabled will no longer crash when encountering a package with an invalid version. ([#13345](https://github.com/pypa/pip/issues/13345) <https://github.com/pypa/pip/issues/13345>_)

• Provide a hint if a system error is raised involving long filenames or path segments on Windows. ([#13346](https://github.com/pypa/pip/issues/13346) <https://github.com/pypa/pip/issues/13346>_)

• Resumed downloads are saved to the HTTP cache like any other normal download. ([#13441](https://github.com/pypa/pip/issues/13441) <https://github.com/pypa/pip/issues/13441>_)

• Configured verbosity is consistently forwarded while calling Git during VCS operations. ([#13329](https://github.com/pypa/pip/issues/13329) <https://github.com/pypa/pip/issues/13329>_)

• Suppress the progress bar, when running with --log and --quiet.

  Consequently, a new auto mode for --progress-bar has been added. auto will enable progress bars unless suppressed by --quiet, while on will always enable progress bars. ([#10915](https://github.com/pypa/pip/issues/10915) <https://github.com/pypa/pip/issues/10915>_)

• Fix normalization of local URLs with non-file schemes. ([#13509](https://github.com/pypa/pip/issues/13509) <https://github.com/pypa/pip/issues/13509>_)

• Fix normalization of local file URLs on Windows in newer Python versions. ([#13510](https://github.com/pypa/pip/issues/13510) <https://github.com/pypa/pip/issues/13510>_)

• Fix remaining test failures in Python 3.14 by adjusting path_to_url and similar functions. ([#13423](https://github.com/pypa/pip/issues/13423) <https://github.com/pypa/pip/issues/13423>_)

• Fix missing network test markings, making the suite pass in offline environments again. ([#13378](https://github.com/pypa/pip/issues/13378) <https://github.com/pypa/pip/issues/13378>_)

Vendored Libraries

• Upgrade CacheControl to 0.14.3
• Upgrade certifi to 2025.7.14
• Upgrade distlib to 0.4.0
• Upgrade msgpack to 1.1.1
• Upgrade platformdirs to 4.3.8
• Upgrade pygments to 2.19.2
• Upgrade requests to 2.32.4
• Upgrade resolvelib to 1.2.0

... (truncated)

Commits

• 2e05cae Bump for release
• f249061 Update AUTHORS.txt
• 78d15a5 Copyedit news entries before 25.2 (again)
• 4fe68d7 Merge pull request #13506 from ichard26/3.14
• 775a86f Fix broken unit tests & xfail weird failure
• 2773b13 Reformat and add --allow-unix-socket to pytest config
• e384d10 Declare Python 3.14 support
• 4117dc7 Always remove authority section when cleaning local URL path (#13510)
• 2e21934 Fix cleaning of local URLs with VCS schemes (#13509)
• 853a593 Improve path_to_url() tests (#13496)
• Additional commits viewable in compare view

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