Update node version

       11 lines hidden 12  12npm install eshttp
 13  13```
 14  14
 15    Requires ES6/2015 JS engine (Node.js 4.0). Example web server using eshttp:
     15Requires ES6/2015 JS engine (Node.js 18.0). Example web server using eshttp:
 16  16
 17  17```js
 18  18'use strict';
       138 lines hidden