[fractal] (4 commits) Non-fast-forward update to branch 574-empty-next-batch

[Alexandre Franke <afranke src gnome org>]

The branch '574-empty-next-batch' 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:

  9abba15... API: handle empty `next_batch` fields

Commits added to the branch:

  4df1625... flatpak: use the version of libhandy that corresponds to th (*)
  4836df0... fractal-gtk: Remove not needed use to clean warnings (*)
  4fca2f0... flatpak: set RUSTFLAGS to "" (*)
  0ed0c83... API: handle empty `next_batch` fields

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