[glibmm: 6/6] Merge branch 'wip/dboles/Binding-master' into 'master'

[Daniel Boles <dboles src gnome org>]

commit 419ce6c2a6b6fd208751e75fb148ba7dbaf9821c
Merge: 704d2412 5f9dc06c
Author: Daniel Boles <dboles src gmail com>
Date:   Fri Nov 15 09:39:50 2019 +0000

    Merge branch 'wip/dboles/Binding-master' into 'master'
    
    [master] Binding: cleanups re SlotTypeTransform/docs, use std::optional in transforms, basic test
    
    See merge request GNOME/glibmm!18

 glib/src/binding.hg          |  71 +++++++++++++++++------------
 tests/Makefile.am            |   2 +
 tests/glibmm_binding/main.cc | 106 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 151 insertions(+), 28 deletions(-)
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