[atkmm] Created tag 2.28.3

[Kjell Ahlstedt <kjellahl src gnome org>]

The unsigned tag '2.28.3' was created.

Tagger: Kjell Ahlstedt <kjellahlstedt gmail com>
Date: 1658320816 +0200

    2.28.3

Changes since the last tag '2.28.2':

Chun-wei Fan (3):
      build: Support Visual Studio 2022
      Meson: Apply '/wd4828' only for gendef.exe
      Meson: Re-organize warnings-related compiler flags for MSVC

Doomsdayrs (1):
      Convert README to MD

Kjell Ahlstedt (10):
      atkmm.h: Atkmm is used by gtkmm-3.0, not by gtkmm-4.0
      meson.build: Specify 'check' option in run_command()
      meson.build: Don't use deprecated python3.path()
      meson.build: Specify 'check' option in run_command(), part 2
      meson.build: Check if Perl is required for building documentation
      meson.build: Avoid configuration warnings
      Require atk >= 2.12.0
      codegen/generate_defs_and_docs.sh: Atk has moved to at-spi2-core
      README.md: Add another link to jhbuild
      2.28.3