[gjs] (10 commits) Non-fast-forward update to branch ewlsh/optional-arguments

[Evan Welsh <ewlsh src gnome org>]

The branch 'ewlsh/optional-arguments' 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:

  4da6f78... gi: Allow undefined for optional arguments

Commits added to the branch:

  f985fca... Gio: Make _promisify to guess the finish function by defaul (*)
  59bbb5e... build: disable gir install via list to pacify meson >= 0.60 (*)
  a652ce8... Merge branch 'meson-0.60.2' into 'master' (*)
  9d3d3c2... maint: Use GjsAutoChar::out() for out-pointers (*)
  2420f5b... maint: Always include config.h (*)
  d925bf6... maint: Fix IWYU includes (*)
  b79eae6... CI: ignore warning about pragma once in IWYU (*)
  0f2cb3c... maint: Don't require lines between single-line class member (*)
  f24a834... Merge branch 'october-maintenance' into 'master' (*)
  d7cb2f1... gi: Allow undefined for optional arguments

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