[CSS minifier] The infinity keyword should be preserved in calc()

[yisibl]

.foo {
  width: calc(infinity * 2);
  height: calc(infinity * 1px);
  padding: calc(InFiNiTy);
}

esbuild 0.14.2 output:

.foo{width:Infinity;height:Infinitypx;padding:Infinity}

Expectations

Maintain the output as is.

CSS Spec: https://drafts.csswg.org/css-values/#calc-error-constants

I'm not sure if infinity/-infinity will trigger this bug in other calculation functions.
Perhaps we should do a thorough check of similar issues to ensure that the new CSS syntax is not broken.

[yisibl]

Chrome Coming Soon: https://groups.google.com/a/chromium.org/g/blink-dev/c/C-qitIHpE9o