Optimize Encore Init

Author: matthieumota

symfony/webpack-encore-bundle/1.0/assets/.gitignore

@@ -9,6 +9,6 @@
 require('../css/app.css');
 
 // Need jQuery? Install it with "yarn add jquery", then uncomment to require it.
-// var $ = require('jquery');
+// let $ = require('jquery');
 
 console.log('Hello Webpack Encore! Edit me in assets/js/app.js');