[tali] (5 commits) Non-fast-forward update to branch flatpak-nightlies

[Jeremy Bicha <jbicha src gnome org>]

The branch 'flatpak-nightlies' 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:

  cc09bd9... meson: update desktop database & icon cache after install
  f93c77c... flatpak: add a flatpak manifest
  2bff04f... ci: build flatpak nightlies

Commits added to the branch:

  cee0424... meson: add tests to validate desktop/appdata files (*)
  31672df... meson: add missing line from previous commit (*)
  d8c7a2e... meson: update desktop database & icon cache after install
  6e5ec9d... flatpak: add a flatpak manifest
  790e2ad... ci: build flatpak nightlies

(*) This commit already existed in another branch; no separate mail sent