Fix sass imports

[alexstrat]

• paths is not a valid option to pass to sass.js (see Add support for Sass includePaths option #55 (comment)) -> remove it before passing compilerOptions to sass.js
• fix import's path resolution

Those 2 fixes worked on my project.

[alexstrat]

@paulcbetts @saschagehlich do you think you could review these changes?

[saschagehlich]

Sorry man, I'm not responsible for this repository. :(

[alreece45]

@alexstrat I'm not a contributor here, the paths fix is simple enough, but the second change doesn't seem as obvious to me. Is the current code removing /sass/ from the path, even when it isn't supposed to?

It may be beneficial to have that as a separate request-- but I'm not responsible for this repository, either.

[Tenrys]

This should fix nested imports, right?
Trying to load the entirety of bulma gets pretty broken right now, file paths seem broken.
@import "node_modules/bulma/bulma" works, @import "sass/utilities/_all" inside of the file doesn't, seemingly because of resolved path issue.