build(deps): bump virtualenv from 20.39.0 to 21.3.0

[dependabot]

Bumps virtualenv from 20.39.0 to 21.3.0.

Release notes

Sourced from virtualenv's releases.

21.3.0

What's Changed

• 🐛 fix(type): stop ty flagging default_source on Action by @​gaborbernat in pypa/virtualenv#3124
• feat: Reintroduce xonsh shell support by @​anki-code in pypa/virtualenv#3125
• 🐛 fix(test): prevent PowerShell activation test from crashing xdist workers on Windows by @​gaborbernat in pypa/virtualenv#3128
• docs: Add usage instruction for Xonsh activation by @​anki-code in pypa/virtualenv#3130
• Upgrade embedded pip/setuptools/wheel by @​github-actions[bot] in pypa/virtualenv#3132

New Contributors

• @​anki-code made their first contribution in pypa/virtualenv#3125

Full Changelog: pypa/virtualenv@21.2.4...21.3.0

21.2.4

What's Changed

• 🐛 fix(periodic-update): refuse unverified HTTPS to PyPI by default by @​gaborbernat in pypa/virtualenv#3122
• 🐛 fix(zipapp): enforce ROOT containment with Path.relative_to by @​gaborbernat in pypa/virtualenv#3121
• 🐛 fix(seed): validate distribution and version before pip download by @​gaborbernat in pypa/virtualenv#3120
• 🐛 fix(seed): verify sha256 of bundled wheels on load by @​gaborbernat in pypa/virtualenv#3119
• 🐛 fix(seed): validate wheel zip entries before extraction by @​gaborbernat in pypa/virtualenv#3118

Full Changelog: pypa/virtualenv@21.2.3...21.2.4

21.2.3

Full Changelog: pypa/virtualenv@21.2.2...21.2.3

21.2.2

What's Changed

• bump python-discovery minimum to 1.2.2 by @​rahuldevikar in pypa/virtualenv#3117

Full Changelog: pypa/virtualenv@21.2.1...21.2.2

21.2.1

What's Changed

• Upgrade embedded pip/setuptools/wheel by @​github-actions[bot] in pypa/virtualenv#3093
• Enhance upgrade workflow: age check, dedup, issue tracking by @​rahuldevikar in pypa/virtualenv#3094

... (truncated)

Changelog

Sourced from virtualenv's changelog.

Features - 21.3.0

• Re-introduce xonsh shell activator (activate.xsh) previously removed in 20.7.0, and make the plugin loader prefer virtualenv's built-in entry points so a third-party package cannot override them by registering a duplicate name. (:issue:3003)

Bugfixes - 21.3.0

• Upgrade embedded wheels:

  • pip to 26.1 (:issue:3132)

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v21.2.4 (2026-04-14)

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Bugfixes - 21.2.4

• Security hardening: validate each entry of a seed wheel archive before extracting it so a tampered wheel cannot escape the app-data image directory via an absolute path or .. traversal. (:issue:3118)
• Security hardening: verify the SHA-256 of every bundled seed wheel when it is loaded so a corrupted or tampered file on disk fails loud instead of being handed to pip. The hash table is generated alongside BUNDLE_SUPPORT by tasks/upgrade_wheels.py. (:issue:3119)
• Security hardening: validate the distribution name and version specifier passed to pip download when acquiring a seed wheel so extras, pip flags, or shell metacharacters cannot be smuggled into the subprocess command line. (:issue:3120)
• Security hardening: replace the string-prefix containment check in virtualenv.util.zipapp with Path.relative_to so the zipapp extraction helpers refuse any path that does not resolve under the archive root. (:issue:3121)
• Security hardening: do not silently fall back to an unverified HTTPS context when the periodic update request to PyPI fails TLS verification. The returned metadata drives which wheel version virtualenv considers "up to date", so accepting an unverified response lets a network-level attacker suppress security updates. Set VIRTUALENV_PERIODIC_UPDATE_INSECURE=1 to restore the previous behavior on hosts with broken trust stores. (:issue:3122)

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v21.2.3 (2026-04-14)

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No significant changes.

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v21.2.2 (2026-04-13)

---

Bugfixes - 21.2.2

... (truncated)

Commits

• e917cc2 release 21.3.0
• 21152f1 Upgrade embedded pip/setuptools/wheel (#3132)
• 096bdcd chore(deps): bump astral-sh/setup-uv from 8.0.0 to 8.1.0 (#3131)
• 01610dc docs: Add usage instruction for Xonsh activation (#3130)
• fb6ec7c 🐛 fix(test): prevent PowerShell activation test from crashing xdist workers o...
• 6095679 [pre-commit.ci] pre-commit autoupdate (#3129)
• 8d3179c chore(deps): bump peter-evans/create-pull-request from 8.1.0 to 8.1.1 (#3127)
• a159c50 chore(deps): bump actions/upload-artifact from 7.0.0 to 7.0.1 (#3126)
• 9ba729b feat: Reintroduce xonsh shell support (#3125)
• d42ea5c 🐛 fix(type): stop ty flagging default_source on Action (#3124)
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