Reported by appstream validate-tree:
leocad.appdata.xml
I: org.leocad.LeoCAD:15: developer-name-tag-deprecated
The toplevel `developer_name` element is deprecated. Please use the `name` element in a
`developer` block instead.
I: org.leocad.LeoCAD:~: developer-info-missing
This component contains no `developer` element with information about its author.
W: org.leocad.LeoCAD:~: metainfo-filename-cid-mismatch
The metainfo filename does not match the component ID.
✘ Validation failed: warnings: 1, infos: 2, pedantic: 2
