Wrong source map sources path

[OpportunityLiu]

Issue

I'm a gentledev i:

• [x] fully read the README recently
• [x] searched for existing issues
• [x] checked i'm up to date with the latest version of the project

Expected behavior

Correct source map

Actual behavior

Duplicate src in source map sources, lead to Failed to parse source map from 'XX\node_modules\svg-pathdata\src\src\mathUtils.ts' file: Error: ENOENT: no such file or directory, open 'XX\node_modules\svg-pathdata\src\src\mathUtils.ts'

https://unpkg.com/browse/svg-pathdata@6.0.2/lib/SVGPathData.cjs.map

Steps to reproduce the behavior

Debugging informations

• node -v result:

  <paste here>

• npm -v result:

  <paste here>

  If the result is lower than 6.9.5, there is poor chances i even have a look to it. Please, use the last NodeJS LTS version.

[pioug]

Please check v6.0.3. Share an example if it's still not working because I am not really familiar with sourcemaps.