message: Change dir for the appdata.xml to metainfo
  The default directory for the appdata xml file changed
  from appdata to metainfo in the AppStream specification
diff: @@ -6,8 +6,8 @@ SUBDIRS = src docs locales artwork
  desktopdir=$(datadir)/applications
  dist_desktop_DATA = net.poedit.Poedit.desktop net.poedit.PoeditURI.desktop
  -appdatadir=$(datadir)/appdata
  -dist_appdata_DATA = net.poedit.Poedit.appdata.xml
  +metainfodir=$(datadir)/metainfo
  +dist_metainfo_DATA = net.poedit.Poedit.appdata.xml
  EXTRA_DIST = \
  deps/json/LICENSE.MIT \
  