Webpack 3 - working configuration for sourcemaps when using typescript

I was recommended here to start a discourse topic, so here I go.

My github issue description on the link above discusses what I did, and how the souremaps did not work for me using the devtool option.

Has anyone else had success using Aurelia skeleton with typescript and webpack, where they are getting sourcemaps (non-inline, separate), that IE 11 can understand?