yarn dev result has error Cannot find module 'source-map-support/source-map-support.js'

Clone repo.
Run yarn.
Run yarn dev.

Built app launches with an error already displayed in the open devtools console.

```
Uncaught Error: Cannot find module 'source-map-support/source-map-support.js'
at Module._resolveFilename (module.js:485)
at Function.Module._resolveFilename (C:\Dev\Web\electron-webpack-quick-start\node_modules\electron\dist\resources\electron.asar\common\r…:35)
at Function.Module._load (module.js:437)
at Module.require (module.js:513)
at require (internal/module.js:11)
at (index):8
```

Win10 64bit
npm 5.8.0
node 8.11.1
yarn 1.5.1