fix: try to remove warn, add sourcemap

[Dlouxgit]

try to fix issue #96

I don't know if this is the right way to do it, but the error no longer occurs.

The error when using nuxt build is as follows:

[netlify]

❌ Deploy Preview for pinceau failed.

Name	Link
🔨 Latest commit	4fa0036
🔍 Latest deploy log	https://app.netlify.com/sites/pinceau/deploys/64d226df99fcc50007cfda3f

[Tahul]

Hey; this seem like a really nice hotfix while I'm working on #103 :)

Thank you a lot!