Hints for popsicle-gtk in cockatiel

Hints

• asv-developer-name-tag-deprecated
  com.system76.Popsicle.appdata.xml:7 -
  The toplevel `developer_name` element is deprecated. Please use the `name` element in a `developer` block instead.
• asv-unknown-provides-item-type
  com.system76.Popsicle.appdata.xml:46 - mimetypes
  The type of the item that the component provides is not known to AppStream.
• asv-unknown-provides-item-type
  com.system76.Popsicle.appdata.xml:50 - binaries
  The type of the item that the component provides is not known to AppStream.
• asv-developer-info-missing
  com.system76.Popsicle.appdata.xml -
  This component contains no `developer` element with information about its author.