Hints for antimicro in main

Warnings

• asv-mimetypes-tag-deprecated
  io.github.antimicrox.antimicrox.appdata.xml:82 -
  The toplevel `mimetypes` tag is deprecated. Please use `mediatype` tags in a `provides` block instead to indicate that your software provides a media handler for the given types.
• asv-url-redefined
  io.github.antimicrox.antimicrox.appdata.xml:71 - homepage
  An URL of this type has already been defined.