Stencil version:

@stencil/core@1.0.3

I'm submitting a:

[ ] bug report
[x] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://stencil-worldwide.herokuapp.com/ or https://forum.ionicframework.com/

Current behavior:
There are no sourcemaps available for either the browser code or the node code. This makes debugging tests and components very difficult.

Expected behavior:
There should be sourcemaps available in all environments (test, dev, prod).

Steps to reproduce:

1. Create a new stencil component library with the starter project
2. Build or test component library
3. Observe that there are no sourcemaps