[gjs: 2/2] Merge branch 'ewlsh/callback-out-args' into 'master'

[Philip Chimento <pchimento src gnome org>]

commit 47f0f0b9d5d81c38b9ac96a6e6ef7ebc5f986bfe
Merge: d992232d 2b70ecce
Author: Philip Chimento <philip chimento gmail com>
Date:   Fri Sep 24 22:17:04 2021 +0000

    Merge branch 'ewlsh/callback-out-args' into 'master'
    
    Handle optional out parameters in callbacks
    
    Closes #439
    
    See merge request GNOME/gjs!681

 gi/arg.cpp      | 26 ++++++++++++++++++++------
 gi/arg.h        |  6 ++----
 gi/function.cpp | 14 ++++++++------
 3 files changed, 30 insertions(+), 16 deletions(-)
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