title: Error 'udenfined "paths"' when overwriting gulpfile.js with gulpconfig.json
body: <p>I have a gulpfile.js that has default paths set, eg:</p>
  
  <pre><code>paths: {
    sass: ['source/style/*.scss', 'source/style/components/**/*.scss'],
  }
  </code></pre>
  
  <p>However, I want to work from another directory with slightly different structure and so have set up a gulpconfig.json file with (within that directory):</p>
  
  <pre><code> {
    "site": {
      "dev": "http://localdev.mysite.com",
      "drushAlias": "site",
      "themePrefix": "si",
      "minify": false
    }
    "paths": {
      "sass":["sass/*.scss", "sass/components/**/*.scss"]
    }
  }
  </code></pre>
  
  <p>But this gives me an error when I try to run gulp:</p>
  
  <pre><code>undefined:8
    "paths": {
    ^
  SyntaxError: Unexpected string in JSON at position 152
  </code></pre>
  
  <p>Would anyone know why this could be occurring?</p>