Providing a sass option breaks the includePaths

[johnhunter]

Steps:

1. Create the eleventy config as per the readme
2. Provide sass options to the eleventy-load-sass loader, e.g.

{
  loader: eleventyLoadSass,
  options: {
    sass: {
      outputStyle: 'compressed',
    }
  }
},

Expected:
Sass files parsed with the expected options

Actual
Sass @import fails to resolve relative paths