title: Trying to run grunt task cssmin and getting this error : TypeError: Object #<Object> has no method 'isAbsolute'
body: <p>TypeError: Object # has no method 'isAbsolute'</p>
  
  <pre><code>cssmin: {
              target: {
                  src: ["styles/css/main.css"],
                  dest: "styles/css/main.min.css"
              }
          }
  </code></pre>