Upgrade system requirements

* Node 10
* npm 6

Author: Artem Sapegin

.travis.yml

@@ -3,4 +3,4 @@ cache:
   directories:
     - node_modules
 node_js:
-  - 9
+  - 10

Readme.md

@@ -22,8 +22,8 @@ To learn command line basics we recommend [Really Friendly Command Line Intro](h
 ## System requirements
 
 - [Git](https://git-scm.com/) 2.0, or newer
-- [Node.js](https://nodejs.org/) 8.6, or newer
-- [npm](https://www.npmjs.com/) 5.4, or newer
+- [Node.js](https://nodejs.org/) 10.0, or newer
+- [npm](https://www.npmjs.com/) 6.0, or newer
 
 We recommend [nvm](https://github.com/creationix/nvm) or [n](https://github.com/tj/n) to install Node.js.
 

scripts/setup.js

@@ -1,8 +1,8 @@
 var verifySystem = require('./vendor/workshop-setup').verifySystem;
 
 verifySystem([
-	verifySystem.validators.node('>=8.6.0'),
-	verifySystem.validators.npm('>=5.4.0'),
+	verifySystem.validators.node('>=10.0.0'),
+	verifySystem.validators.npm('>=6.0.0'),
 	function verifyDeps() {
 		// Doesn't really verify dependencies, just checks that the user has
 		// installed them at least once. Real verification would be too slow