title: grunt-contrib-cssmin : Relative path of images is not replaced in target minified file
body: <p>I am using grunt-contrib-cssmin, for the minification of my css files. I want the relative urls in the css files to be replaced automatically in my target minified file. I have looked for this problem and found the two options that I can use to replace the url, </p>
  
  <blockquote>
    <p>target, root</p>
  </blockquote>
  
  <p>I think <code>target</code> is the one I am supposed to be using. I tried it in my following Gruntfile.js but it did not resulted in the minified file that I wanted.</p>
  
  <p>Following is the Gruntfile.js </p>
  
  <pre><code>module.exports = function(grunt) {
  // Project configuration.
  grunt.initConfig({
    cssmin: {
      combine: {
        options: {
          target: "build/"
        },
        files: [{
          dest: 'build/app.min.css',
          src: "Modules/test/app.css"
        }]
      }
    }
  });
  
  grunt.loadNpmTasks('grunt-contrib-cssmin');
  
  // Default task(s).
  grunt.registerTask('default', ['cssmin']);
  };
  </code></pre>
  
  <p>It converts following app.css -:</p>
  
  <pre><code>.edit {
    background: url(../../Main/img/edit.png);
  }
  </code></pre>
  
  <p>to following app.min.css</p>
  
  <pre><code>.edit{background:url(../../Main/img/edit.png)}
  </code></pre>
  
  <p>What I want is that the URL of the minified be something like the following -:</p>
  
  <pre><code>.edit{background:url(../Main/img/edit.png)}
  </code></pre>
  
  <p>I think the target options is supposed to change the relative URL, but it is doing nothing in my case. Please let me know what I am doing anything wrong.</p>
  
  <p>Thanks,</p>
  
  <p>Sukhdeep</p>