[devhelp] (3 commits) Non-fast-forward update to branch alatiera/remove-amtk

[Jordan Petridis <jpetridis src gnome org>]

The branch 'alatiera/remove-amtk' 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:

  3c4dbf7... Revert "Revert "Revert the introduction of the amtk library

Commits added to the branch:

  0db498d... Release 40.0 (*)
  b322581... ci: Add job for Flatpak build (*)
  1d5c8da... Revert "Revert "Revert the introduction of the amtk library

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