Development info in README/wiki is outdated and won't build.

[eth-p]

Checklist:

• I have checked that there are no issues with similar or the same content

  YOU SHOULD CHECK CLOSED ISSUES ASWELL

• I have checked the FAQ (https://github.com/MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL-/wiki/FAQ) and the answer I am looking for is not there

• I have double checked and can reproduce the issue

OS:
MacOS Mojave

GPMDP Version:
git master branch.

Issue Descriptions:
The documentation for building the project is out of date, and it fails to build on MacOS.

Steps to Reproduce:

git clone "git@github.com:eth-p/Google-Play-Music-Desktop-Player-UNOFFICIAL-.git" gpmdp
cd gpmdp
npm install   # Errors
npm run build # Errors

Recommended changes:

1. Suggest Node 8 for MacOS. Versions prior to NodeJS v8.0 will fail to compile node-gyp modules due to a breaking change that Apple made to Xcode/command line tools (Node.js 6.x on macOS / Xcode 10.1 failing to compile (libc++) nodejs/node#24648).

2. Replace npm install with yarn install (building windows binary fails under wsl and ubuntu vm #3591 (comment)).

[welcome]

👋 Thanks for opening your first issue here! If you're reporting a 🐞 bug, please make sure you include steps to reproduce it. We get a lot of duplicate issues on this repo, so please double check now that your issue has not already been solved or doesn't have an open issue already.

To help make it easier for us to investigate your issue, please follow the contributing guidelines and ensure the issue template was filled out.

[FerLuisxd]

This also happens with windows 10 && debian 10

I have an issue compiling runas on both platforms

[FerLuisxd]

@MarshallOfSound sorry for the ping but can you check this please?