[Bug] grid-template identifiers do not get transformed (with CSS modules) when var() is used

[mkrause]

See Playground:

.test {
  grid-template: "test" var(--foo);
  grid-template: "test" 1fr;
}

Results in:

.EgL3uq_test {
  grid-template: "test" var(--foo);
  grid-template: "EgL3uq_test" 1fr;
}

Note how this works as expected when 1fr is specified as size, but when var(--foo) is specified the template area name is left as a global identifier "test". This makes it impossible to use grid-template with var(), because the grid-area identifier will still be transformed, preventing the area from being assigned.