[gnome-software] (7 commits) Non-fast-forward update to branch wip/mak/libas

[Matthias Klumpp <mak src gnome org>]

The branch 'wip/mak/libas' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  60c16ea... Port to appstream
  f635617... Delete defunct remnants of shell-extension support
  46bfd0a... Use separate enum for OS update pseudo-apps
  7bc5f56... Fix tests for AppStream transition
  eb7aae8... Replace AS_URL_KIND_MISSING with explicit property
  35759fb... trivial: Suggest using appstreamcli for NEWS/validate
  195a68e... hack: Make CI work (temporary commit)

Commits added to the branch:

  c8404ce... Port to appstream
  d60f28c... Delete defunct remnants of shell-extension support
  575a3a3... Use separate enum for OS update pseudo-apps
  7316353... Fix tests for AppStream transition
  8410c07... Replace AS_URL_KIND_MISSING with explicit property
  961ea9e... trivial: Suggest using appstreamcli for NEWS/validate
  18368b8... hack: Make CI work (temporary commit)