Node 12 not supported

[johnsonlin]

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Short description of the problem:

NPM tries to download node-sass from https://github.com/sass/node-sass/releases/download/v4.11.0/win32-x64-72_binding.node
which doesn't exists in 4.11.0 release.

What behavior are you expecting?

Steps to reproduce:

1. Windows 10 with Node 12.4.0 (npm 6.9.0)
2. ionic start ionic 3 project
3. npm i
4. > node-sass@4.11.0 install E:\dev\TEMP-MOBILE-APP\node_modules\node-sass
   > node scripts/install.js
   >Downloading binary from https://github.com/sass/node-sass/releases/download/v4.11.0/win32-x64-72_binding.node
   > Cannot download "https://github.com/sass/node-sass/releases/download/v4.11.0/win32-x64-72_binding.node":
   >HTTP error 404 Not Found

Which @ionic/app-scripts version are you using?
3.2.4

Other information: (e.g. stacktraces, related issues, suggestions how to fix, stackoverflow links, forum links, etc)
Please update node-sass deps to 4.12.0

It was the local package-lock.json that stops me from installing the latest deps.
Sorry for the trouble. Please ignore.