chore(deps): update dependency less to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
less (source)	3.12.2 → 4.9.1

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Release Notes

less/less.js (less)

v4.9.1

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Changes

• #​4478 fix: error when a mixin call is used as a property value (@​Lfan-ke)

v4.9.0

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Changes

• #​4488 feat: support [...] lookups in @{...} interpolation (@​matthew-dean)
• #​4486 fix: prevent reparsing escape() results (@​snowyukitty)
• #​4481 fix: keep the media type first when flattening nested @​media queries (@​Lfan-ke)

v4.8.1

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Changes

• #​4483 fix(release): sync release version from PR title (@​matthew-dean)
• #​4479 fix: leave math functions for the browser when an argument is a runtime CSS var() (@​Lfan-ke)
• #​4477 fix: forwarding an unset variadic no longer overrides callee defaults (@​Lfan-ke)
• #​4474 chore: release v4.8.0 — deprecate legacy identifier forms and dynamic @​charset (@​app/github-actions)

v4.8.0

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Changes

• #​4473 fix(mixing): resolves issue #​4234 (@​puckowski)
• #​4472 Fix boolean() parsing for comparisons between inline condition expressions (@​app/copilot-swe-agent)

Deprecation Warnings

• #​4475 Deprecate numeric-leading and dash-only variable names, dash-only mixin names, and dynamic @charset interpolation for removal in Less 5.x. Less 4 preserves the existing output while warning; migrate names to valid identifiers and use a static quoted @charset declaration. (@​matthew-dean)

v4.7.0

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Changes

• #​4469 Follow-up to #​4462: migrate remaining @​var fixtures, DRY the prelude bare-@​var scan, add warnings coverage (@​matthew-dean)
• #​4462 feat: deprecate bare @​variable in non-value at-rule positions (@​matthew-dean)
• #​4461 Fix #​4460: parse comparison/range syntax in container style() queries (@​dweep-js)
• #​4459 refactor: extract shared ESLint config and add lint scripts (@​JessenReinhart)
• #​4456 Replace image-size with probe-image-size (@​priyamkarn)

v4.6.7

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Changes

• #​4457 Fix failing "Request Copilot review" CI job (@​app/copilot-swe-agent)
• #​4451 chore: release v4.6.6 (@​app/github-actions)

v4.6.6

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Changes

• #​4450 fix: use printf for PR body to avoid YAML indentation error in run block (@​matthew-dean)
• #​4449 fix: correct push event typo in create-release-pr workflow (pus → push:) (@​matthew-dean)
• #​4446 fix: avoid TypeError on nested @​supports with dumpLineNumbers (@​sarathfrancis90)
• #​4441 Preserve spacing for container feature functions (@​puneetdixit200)
• #​4440 chore: prevent dependency lifecycle scripts (@​puckowski)
• #​4437 docs: fix incorrect contributor attributions in v4.6.0 changelog (@​barry3406)
• #​4434 fix(issue#4316): color calc inside from expression (@​puckowski)

v4.6.5

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Bug Fixes

• #​4444 Fix browser export interop by routing bundlers to CJS-typed UMD artifact (@​Copilot)
• #​4427 Fix parenthesis in media query (@​puckowski)
• #​4421 Fix not keyword silently ignored when used without parentheses in conditions (@​Copilot)
• #​4426 Upgrade make-dir to v4 to fix security vulnerability (@​jorenbroekema)

Maintenance

• #​4447 Automate CHANGELOG generation in release workflow (@​matthew-dean)
• #​4448 Add continue-on-error to copilot-review CI job (@​matthew-dean)
• #​4445 Fix Playwright chromium install hang on Node current/lts/* (@​matthew-dean)
• #​4431 PR-based release flow for alpha branches (@​Copilot)
• #​4430 Ensure npm publish is always backed by a GitHub tag, release, and version-bump commit (@​Copilot)
• #​4432 Update packageManager to pnpm@​9.15.9 to match lockfileVersion 9.0 (@​Copilot)
• #​4420 Regression test for @​container mixin parameter variable resolution (@​Copilot)

v4.6.4

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Tests

• #​4422 Add coverage for :is()/:matches()/:where() containing nested :has() selectors and comma-separated lists (@​Copilot)

v4.6.3

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Bug Fixes

• #​4424 Fix webpack browser build - use UMD dist/less.js, add CJS bundle (@​matthew-dean)

v4.6.2

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Maintenance

• #​4418 Fix publish script to skip stale version markers in squash merges (@​matthew-dean)
• #​4419 Remove .claude directory and add to .gitignore (@​matthew-dean)

v4.6.1

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Bug Fixes

• #​4417 Fix CJS compatibility, enriched npm README, ESM tests (@​matthew-dean)

v4.6.0

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Changes

• #​4450 fix: use printf for PR body to avoid YAML indentation error in run block (@​matthew-dean)
• #​4449 fix: correct push event typo in create-release-pr workflow (pus → push:) (@​matthew-dean)
• #​4446 fix: avoid TypeError on nested @​supports with dumpLineNumbers (@​sarathfrancis90)
• #​4441 Preserve spacing for container feature functions (@​puneetdixit200)
• #​4440 chore: prevent dependency lifecycle scripts (@​puckowski)
• #​4437 docs: fix incorrect contributor attributions in v4.6.0 changelog (@​barry3406)
• #​4434 fix(issue#4316): color calc inside from expression (@​puckowski)

v4.5.1

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Automated patch release — no user-facing changes.

v4.4.2

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• #​4357 Migrate Less test data to use valid CSS (@​matthew-dean)
• #​4363 Fix [#​4362] no spacing regression for function (@​puckowski)

v4.4.1

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• #​4342 Add support for CSS scroll state container queries (@​puckowski)
• #​4349 Fix #​4348 parse layer nesting syntax (@​puckowski)

v4.4.0

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• #​4337 Add support for layer at-rule (@​puckowski)
• #​4340 Add support for import at-rule layer functionality (@​puckowski)
• #​4346 Fix #​4343 add color operands (@​puckowski)

v4.3.0

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• #​4319 Add deprecation warnings to Less output during parsing and new quiet flag (@​matthew-dean)
• #​4320 Update README.md to remove Lerna reference (@​matthew-dean)
• #​4322 Revise Playwright install method for CI stability (@​puckowski)
• #​4333 Add support for starting-style at rule. (@​puckowski)

v4.2.2

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• #​4290 Fix #​4268 nested pseudo-selector parsing (@​puckowski)
• #​4291 Enhance Less.js test environment setup (#​4291) (@​iChenLei)
• #​4295 Fix #​4252 container queries created via mixin evaluating variables incorrectly (@​puckowski)
• #​4294 Fix #​3737 allow blank variable declarationd (@​puckowski)
• #​4292 Fix #​4258 variable interpolation after math (@​puckowski)
• #​4293 Fix #​4264 strip line comment from expression (@​puckowski)
• #​4302 Fix #​4301 at-rule declarations missing (@​puckowski)
• #​4309 Fix Node 23 CI (#​4309) (@​iChenLei)

v4.2.1

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• #​4237 Fix #​4235 container style queries extra space resolved (@​puckowski)

v4.2.0

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• #​3811 add support for container queries (@​puckowski)
• #​3761 fix faulty source map generation with variables in selectors, fixes #​3567 (@​pgoldberg)
• #​3700 parsing variables fail when there is no trailing semicolon (@​b-kelly)
• #​3719 modify this pointer so that it is not empty. (@​lumburr)
• #​3649 fixes #​2991 empty @​media queries generated when compiling less file with (reference) to bootstrap (@​MoonCoral)

v4.1.3

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• #​3673 Feat: add support for case-insensitive attribute selectors (#​3673) (@​iChenLei)
• #​3710 Feat: add disablePluginRule flag for render() options (#​3710) (@​broofa @​edhgoose)
• #​3656 Fix #​3655 for param tag is null (#​3658) (@​langren1353)
• #​3658 Fix #​3646 forcefully change unsupported input to strings (#​3658) (@​gzb1128)
• #​3668 Fix change keyword plugin and import regexp (#​3668) (@​iChenLei)
• #​3613 Fix #​3591: refactor debugInfo from class to function (#​3613) (@​drdevlin)
• #​3716 Fix https failures on macOS (#​3716) (@​joeyparrish)

v4.1.2

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• #​3602 Fix currentFileInfo and index properties on nodes (#​3602) (@​bjpbakker)
• #​3626 Fix #​3616 IfStatement requires double parentheses when dividing (#​3626) (@​iChenLei)
• #​3630 Fix needle dependency warning typo. (#​3630) (@​cjwilsontech)

v4.1.1

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• #​3597 Fix expected response when there's a socket error (#​3597) (@​zxfrank)
• #​3589 Fixes #​3586 (#​3589) (@​matthew-dean)

v4.1.0

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• #​3582 Fix #​3576 import redirects. Replace native-request with needle. (#​3582) (@​zaquest)
• #​3583 Update rollup and other build dependencies (#​3583) (@​pravi)
• #​3588 Roll back paren requirement on mixin calls (#​3588) (@​matthew-dean)

v4.0.0

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• #​3573 v4.0.0 (#​3573) (@​matthew-dean)

v3.13.1

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• #​3575 Fixes #​3574 (#​3575) (@​matthew-dean)

v3.13.0

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• #​3572 Fixes #​3434 - memory / runtime improvements (#​3572) (@​matthew-dean)
• #​3550 Examples contain more valid CSS, to test with a new parser (#​3550) (@​matthew-dean)
• #​3546 Bug fixes - fixes #​3446 #​3368 (#​3546) (@​matthew-dean)

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