[glibmm/glibmm-2-66: 5/5] Merge branch 'std-string-msvc-fixes-2-66' into 'glibmm-2-66'

[Chun-wei Fan <fanchunwei src gnome org>]

commit 8f2218deb0f7cd2b58a1dd1b15c89980d256a69f
Merge: 903eeb1b 0075d18b
Author: Chun-wei Fan <fanc999 yahoo com tw>
Date:   Fri May 14 18:47:54 2021 +0000

    Merge branch 'std-string-msvc-fixes-2-66' into 'glibmm-2-66'
    
    Export classes selectively (glibmm-2-66 branch, fix issue #90)
    
    See merge request GNOME/glibmm!52

 MSVC_NMake/config-msvc.mak      |   3 +-
 gio/src/fileattributeinfo.hg    |  20 +--
 glib/glibmm/ustring.h           | 334 ++++++++++++++++++++--------------------
 glib/glibmm/variantdbusstring.h |   4 +-
 meson.build                     |   2 +-
 5 files changed, 181 insertions(+), 182 deletions(-)
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