Created by: tagliala
postcss-values-parser returns a syntax error when a negative value is
provided in a calc function after a CSS variable.
This is not an issue with Bootstrap itself, but a workaround to allow projects using postcss-values-parser to keep upgrading and compiling bootstrap
Ref: shellscape/postcss-values-parser#138, twbs/bootstrap#35033
Fix: #36851 (closed)