title: Converting Gulp tasks into Npm's script
body: <p>I have been using <code>Gulp</code> for a while and I just discovered a way to run some of the <code>Gulp</code> tasks such as browserify/watchify/less via <code>package.json's</code> scripts. For example:</p>
  
  <pre><code>"scripts": {
      "watch": "npm run watch-js &amp; npm run watch-less &amp; npm run watch-server",
      "watch-js": "watchify app/js/main.js -t -o static/bundle.js -dv",
      "watch-less": "nodemon --watch app/less/*.less --ext less --exec 'npm run build-less'"
  }
  </code></pre>
  
  <p>Since <code>browserify/watchify/less</code> are native <code>npm</code> packages I would like to know how can I reproduce/convert (without writing custom bash/zsh scripts) my other <code>Gulp</code> tasks such as <code>gulp-rev</code>, <code>gulp-s3</code> to work with <code>npm's scripts</code>?</p>