build(deps): update tox requirement from >=3.9.0 to >=4.61.5

[dependabot]

Updates the requirements on tox to permit the latest version.

Release notes

Sourced from tox's releases.

v4.61.5

What's Changed

• chore(type): narrow execute_async cwd for pyrefly 1.3 by @​yuefdev in tox-dev/tox#4069
• docs: fix the parameter list on Loader.build by @​hxperl in tox-dev/tox#4070
• fix(config): reject boolean TOML range bounds by @​yuefdev in tox-dev/tox#4066
• fix(config): accept empty set_env lists by @​yuefdev in tox-dev/tox#4065
• fix: correct coverage startup environment variable by @​yuefdev in tox-dev/tox#4067
• fix(config): let empty factor fallbacks override TOML group defaults by @​glaziermag in tox-dev/tox#4072

New Contributors

• @​yuefdev made their first contribution in tox-dev/tox#4069
• @​hxperl made their first contribution in tox-dev/tox#4070
• @​glaziermag made their first contribution in tox-dev/tox#4072

Full Changelog: tox-dev/tox@4.61.4...4.61.5

Changelog

Sourced from tox's changelog.

Bug fixes - 4.61.5

• An empty set_env list in TOML no longer fails to load; like an empty table, it clears inherited variables - by :user:yuefdev. (:issue:4065)
• A TOML factor range now rejects true or false as start or stop instead of reading them as 1 and 0 - by :user:yuefdev. (:issue:4066)
• Preserve an explicitly empty {factor:label:} fallback instead of using the declared factor group default. (:issue:4072)

Improved documentation - 4.61.5

• Loader.build documented a future parameter it no longer takes and left factory undocumented, so the plugin API reference listed a parameter that does not exist - by :user:hxperl. (:issue:4070)

Contributor-facing changes - 4.61.5

• Restore COVERAGE_PROCESS_START in the test environments; a mangled key had left it unset since the move to tox.toml - by :user:yuefdev. (:issue:4067)

---

v4.61.4 (2026-09-09)

---

Bug fixes - 4.61.4

• Shebang parsing now uses shlex, so a quoted interpreter path that contains spaces is kept as one argument when TOX_LIMITED_SHEBANG rewrites the invocation - by :user:r3wretrhy. (:issue:4064)

---

v4.61.3 (2026-09-08)

---

Bug fixes - 4.61.3

• A set_env environment file (file|.env) is now read as UTF-8 instead of the platform's locale encoding, so non-ASCII values no longer arrive mangled on Windows - by :user:MohammedAlkindi. (:issue:4059)
• Preserve UNC and extended-length paths in Windows commands, including quoted paths - by :user:MohammedAlkindi. (:issue:4060)
• Normalize project and extra names in dependency-group self-references - by :user:MohammedAlkindi. (:issue:4061)
• Register factor labels and defaults for bare labeled dicts in env_list - by :user:dylanpulver. (:issue:4062)

---

v4.61.2 (2026-08-31)

---

... (truncated)

Commits

• 40a5d2b release 4.61.5
• c504e48 fix(config): let empty factor fallbacks override TOML group defaults (#4072)
• a5a7ce6 fix: correct coverage startup environment variable (#4067)
• 3632978 fix(config): accept empty set_env lists (#4065)
• b429bcc fix(config): reject boolean TOML range bounds (#4066)
• 0975be8 [pre-commit.ci] pre-commit autoupdate (#4068)
• 7b5068b docs: fix the parameter list on Loader.build (#4070)
• 2b650b0 chore(type): narrow execute_async cwd for pyrefly 1.3 (#4069)
• 2a06036 release 4.61.4
• eea1cb7 🐛 fix(execute): keep spaces in quoted shebang interpreter paths (#4064)
• Additional commits viewable in compare view