Non stable order for keys in CSSModuleExports

[ArnaudBarre]

You can play with this example: Add and remove new lines at the end of the playground and see the CSS modules output changed.

I need this to be able to better cache the JS file resulting from the CSS modules exports. This is not a big issue, I can easily resort the keys in JS.

Unrelated: Maybe the blue -> #00f transformation should only be applied when minify is on

[devongovett]

Rust HashMap does not have a stable order, which is why this happens. We could probably move to indexmap assuming there is no perf regression and the binary size increase isn't too big...

[ArnaudBarre]

Yes of course if there is a cost for everyone I can ensure the stable on my side