build(deps-dev): bump the pip-dependencies group in /requirements.d with 2 updates

[dependabot]

Bumps the pip-dependencies group in /requirements.d with 2 updates: pkgconfig and tox.

Updates pkgconfig from 1.5.5 to 1.6.0

Release notes

Sourced from pkgconfig's releases.

v1.6.0

Changes see there: https://github.com/matze/pkgconfig?tab=readme-ov-file#changelog

Commits

• 463480d update changelog
• 21cf3b1 README: pkg-config and pkgconf, #75
• 4c62cb1 brew: use pkgconf instead of pkg-config
• 784425f CI: update actions
• ca1d009 CI: use macos-15 / py313
• 3cf03e0 CI: remove duplicate py313 job
• abf083a Merge pull request #79 from ThomasWaldmann/misc-updates
• 5d16c48 work around tox setup.cfg bug
• 7f9545d CI: test on Python 3.14
• 76ce1ca code: fix typos and grammar
• Additional commits viewable in compare view

Updates tox from 4.46.3 to 4.49.0

Release notes

Sourced from tox's releases.

v4.49.0

What's Changed

• ✨ feat(config): add {factor:label} substitution for TOML by @​gaborbernat in tox-dev/tox#3865
• 🐛 fix(legacy): initialize config_format and output_file for --showconfig by @​rares985 in tox-dev/tox#3867

New Contributors

• @​rares985 made their first contribution in tox-dev/tox#3867

Full Changelog: tox-dev/tox@4.48.1...4.49.0

v4.48.1

What's Changed

• Replace archived 31z4/tox Docker image with build-your-own guide by @​rahuldevikar in tox-dev/tox#3864
• 🐛 fix(toml): extract args from Command in ref replacement by @​gaborbernat in tox-dev/tox#3863

Full Changelog: tox-dev/tox@4.48.0...4.48.1

v4.48.0

What's Changed

• Add fail_fast to config reference docs by @​rahuldevikar in tox-dev/tox#3853
• ✨ feat(config): add --format json/toml and -o to config command by @​gaborbernat in tox-dev/tox#3857

Full Changelog: tox-dev/tox@4.47.3...4.48.0

v4.47.3

What's Changed

• Fix SchemaStore workflow creating empty PRs by @​gaborbernat in tox-dev/tox#3848
• Add .mailmap to consolidate author identities by @​yarikoptic in tox-dev/tox#3849
• 🐛 fix(config): honor ignore_base_python_conflict for factor conflicts by @​gaborbernat in tox-dev/tox#3851

Full Changelog: tox-dev/tox@4.47.2...4.47.3

v4.47.2

What's Changed

• fix: handle OSError in pos_args path existence check by @​yarikoptic in tox-dev/tox#3847

New Contributors

... (truncated)

Changelog

Sourced from tox's changelog.

Features - 4.49.0

• Add {factor:label} substitution for TOML configs -- factor groups in product matrices and env_base factors can now be labeled with single-key dicts (e.g., {ecosystem = ["oci", "python"]}), enabling {factor:ecosystem} in any string value (descriptions, commands, etc.) to resolve to the active factor. Plain lists automatically get positional labels ({factor:0}, {factor:1}, ...) - by :user:gaborbernat. (:issue:3860) (:issue:3860)

Bug fixes - 4.49.0

• Fix --showconfig and --help-ini legacy flags raising AttributeError after config format options were added
  • by :user:rares985 (:issue:3866)

---

v4.48.1 (2026-03-06)

---

Bug fixes - 4.48.1

• Command-type configuration values like list_dependencies_command can now be referenced in TOML using the structured {replace = "ref"} syntax. The reference automatically extracts the command's argument list for compatibility with TOML's list[list[str]] structure - by :user:gaborbernat. (:issue:3830)

Improved documentation - 4.48.1

• Replace archived 31z4/tox Docker image recommendation with instructions for building your own image using the official Python base image and uv - by :user:rahuldevikar. (:issue:3855)

---

v4.48.0 (2026-03-05)

---

Features - 4.48.0

• Add --format flag (ini, json, toml) and -o/--output-file to the config command for machine-readable output with native types. JSON and TOML use the same key structure as tox.toml (env.<name> for environments, tox for core) and get syntax-highlighted on stdout - by :user:gaborbernat. (:issue:3854)

Improved documentation - 4.48.0

• Add fail_fast to the configuration reference documentation - by :user:rahuldevikar. (:issue:578)

---

v4.47.3 (2026-03-04)

---

... (truncated)

Commits

• 6c452bb release 4.49.0
• 1c59d54 🐛 fix(legacy): initialize config_format and output_file for --showconfig (#3867)
• 2382601 ✨ feat(config): add {factor:label} substitution for TOML (#3865)
• ccf173f release 4.48.1
• 113bcf8 🐛 fix(toml): extract args from Command in ref replacement (#3863)
• fc50406 Replace archived 31z4/tox Docker image with build-your-own guide (#3864)
• 51317d3 release 4.48.0
• 4c72887 ✨ feat(config): add --format json/toml and -o to config command (#3857)
• dd190f6 Add fail_fast to config reference docs (#3853)
• 2c8c5b2 release 4.47.3
• Additional commits viewable in compare view

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[ThomasWaldmann]

@dependabot ignore tox minor version

[dependabot]

OK, I won't notify you about version 4.49.x of tox again, unless you unignore it.

[ThomasWaldmann]

@dependabot recreate