* Fixes issue with blank CSS variable declarations.

* fix(issue:4258) variable interpolation after math

* Fixes variable interpolation issue after previous variable addition.

* chore: fix rebase issue

* Fix rebase issue for fix for issue #4258.

* Fix for issue #4264. Strip line comments from expressions to avoid
  invalid CSS output.

* Fixes issue #4301. At-rule declarations may go missing or are
  incorrectly merged under certain nesting conditions.
* Added more ```@container``` tests.

* fix: pptr timeout issue

* fix: try again

* chore: fix pptr timeout issue

* fix: test scripts

* chore: drop node 10/12/14

* fix: node 23 deprecated api

* chore: tru again

* fix: windows

* fix: windows is

* chore: test node14

* fix: drop node v10/v12/v14 support

* chore: remove sandbox config

* fix: add sandbox config

* ci: try playwright

* chore: update ci yml

* chore: test node

* chore: add all test

* fix: yml grammer

* chore: try topo

* chore: node23 test

* chore: nodejs v23

* fix: yml grammer

* fix: steps's id

* chore: final test config

* chore: update folder name

* chore: refactor

* chore: update title

* chore: improve code quality

* fix: node23 ci

* Update package-lock.json

* chore: rename node23 ci

* chore: rename

* Release v4.2.2

* Update files for Release/v4.2.2.

* chore: update changelog for CI merges

* Update CHANGELOG.md for recent CI update merges.