Hints for worker in main

Hints

• asv-screenshot-media-url-not-secure
  de.boomerangsworld.worker.metainfo.xml:25 - http://www.boomerangsworld.de/cms/worker/pics/worker-mainwindow1.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-url-not-secure
  de.boomerangsworld.worker.metainfo.xml:48 - http://www.boomerangsworld.de/cms/worker/
  Consider using a secure (HTTPS) URL for this web link.
• asv-content-rating-missing
  de.boomerangsworld.worker.metainfo.xml -
  This component has no `content_rating` tag to provide age rating information. You can generate the tag data online by answering a few questions at https://hughsie.github.io/oars/
• asv-developer-info-missing
  de.boomerangsworld.worker.metainfo.xml -
  This component contains no `developer` element with information about its author.