chore(package) ~ supporting the beloved yarn

Author: katallaxie

README.md

@@ -146,7 +146,7 @@ Once you have those, you should install these globals with `npm install --global
 * `fork` this repo
 * `clone` your fork
 * `npm install webpack-dev-server rimraf webpack -g` to install required global dependencies
-* `npm install` to install all dependencies
+* `npm install` to install all dependencies or `yarn`
 * `npm run server` to start the dev server in another tab
 
 ## Running the app