[gnome-software] (6 commits) Non-fast-forward update to branch wip/rancell/snapauth

[Robert Ancell <rancell src gnome org>]

The branch 'wip/rancell/snapauth' 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:

  54d259e... snapd: Use snap authentication

Commits added to the branch:

  348f8f4... trivial: Fix invalid use of autoptr with install/remove aut (*)
  214b240... trivial: Use g_autoptr for GsShellDetailsReviewHelper (*)
  2bfbe9c... snapd: Drop unused Macaroon code - it will be replaced by a (*)
  bdde45f... snapd: Handle responses without Content-Length header (*)
  66acadc... snapd: Allow snapd operations to be cancelled (*)
  faaaa3b... snapd: Use snap authentication

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