Update check-version.js (#264)

* Update check-version.js

Simplify node version check

* Update check-version.js

code style

Author: FDiskas

lib/check-version.js

@@ -4,17 +4,10 @@ var chalk = require('chalk')
 var packageConfig = require('../package.json')
 
 module.exports = function (done) {
-  // Parse version number from strings such as 'v4.2.0' or `>=4.0.0'
-  function parseVersionNumber (versionString) {
-    return parseFloat(versionString.replace(/[^\d\.]/g, ''))
-  }
-
   // Ensure minimum supported node version is used
-  var minNodeVersion = parseVersionNumber(packageConfig.engines.node)
-  var currentNodeVersion = parseVersionNumber(process.version)
-  if (minNodeVersion > currentNodeVersion) {
+  if (!semver.satisfies(process.version, packageConfig.engines.node)) {
     return console.log(chalk.red(
-      '  You must upgrade node to >=' + minNodeVersion + '.x to use vue-cli'
+      '  You must upgrade node to >=' + packageConfig.engines.node + '.x to use vue-cli'
     ))
   }