Single quotes in start:dev should be double quotes to support Windows

[tysonmatanich]

In package.json the following needs changed from:

"start:dev": "parallelshell 'npm run build:watch' 'npm run build:watch:client' 'nodemon ./build/server/index.js'",

to:

"start:dev": "parallelshell \"npm run build:watch\" \"npm run build:watch:client\" \"nodemon ./build/server/index.js\"",

darkguy2008/parallelshell#1