title: Error with log4js configuration: must have a property "appenders" of type object
body: <p>I am getting Error: Problem with log4js configuration: ({ appenders:
     [ { type: 'logLevelFilter',
         level: 'INFO',
         appenders: { type: 'console' } } ] }) - must have a property "appenders" of type object.</p>
  
  <p>My protractor.conf.js file snippet:</p>
  
  <pre><code>beforeLaunch:function(){
      log4js.configure({
          appenders: 
          [{ type: 'log4js-protractor-appender', 
  category: 'protractorLog4js' },
              {
                  type: "file",
                  filename: './logs/ExecutionLog.log',
                  category: 'protractorLog4js'
              }
          ]
      });
    },
  </code></pre>
  
  <p>I am not sure why i am getting this error even though there is appenders in the conf.</p>