Hints for supertuxkart in main

Hints

• asv-developer-name-tag-deprecated
  net.supertuxkart.SuperTuxKart.metainfo.xml:372 -
  The toplevel `developer_name` element is deprecated. Please use the `name` element in a `developer` block instead.
• asv-relation-memory-in-requires
  net.supertuxkart.SuperTuxKart.metainfo.xml:519 -
  Found a memory size relation in a `requires` tag. This means users will not be able to even install the component without having enough RAM. This is usually not intended and you want to use `memory` in the `recommends` tag instead.
• asv-developer-info-missing
  net.supertuxkart.SuperTuxKart.metainfo.xml -
  This component contains no `developer` element with information about its author.