title: how to add flags to a grunt execute task
body: <p>i am trying to run a node file with grunt.js</p>
  
  <p>for some reasons i am not able to provide the node file with argument.</p>
  
  <p>this is what i want to happend:</p>
  
  <pre><code>node server/index.js -e development-local
  </code></pre>
  
  <p>and this is my  configuration:</p>
  
  <pre><code>   execute: {
        development_target: {
          src: ['index.js'],
          options: {
            args: ['e development-local',]
          }
        }
      }
  
    grunt.registerTask('serve-local', ['execute:development_target']);
  </code></pre>
  
  <p>but it is not working for some reason. i tried everything.</p>