Describe the bug
Currently, when we have prependData option of scss preprocessor, the lang type of <style> is not being respected, the prependData are being injected ignoring the lang type. The prependData logic should be executed only when lang="scss" or lang="sass".

To Reproduce
https://github.com/maykefreitas/svelte-preprocess-example

Expected behavior
The expected behavior would be to not inject prependData unless the style tag has lang="scss".

Information about your project:

• svelte-preprocess version: latest

The cause of this bug is the fact that this logic should be executed after the if declaration, not before.