Checklist before submitting an issue

• I have searched through the existing closed and open issues for eww and made sure this is not a duplicate
• I have specifically verified that this bug is not a common user error
• I am providing as much relevant information as I am able to in this bug report (Minimal config to reproduce the issue for example, if applicable)

Description of the bug

After updating eww to the latest commit (coming from the release branch) I noticed it no longer recognized common scss functions (notably string.unique-id() and possibly others I haven't checked).
After some digging I found that removing the default-features flag from grass in Cargo.toml fixes this issue

Seems like this change was made for faster build times and should have no noticeable impact however I lack much knowledge of rust and this project so unsure if it has any unintended issues.

Reproducing the issue

use the following scss code

@use "sass:string";

$unique: string.unique-id();

and it will not execute the function

Expected behaviour

it should've ran the function as expected

Additional context

No response