[glibmm] Created tag 2.68.1

[Kjell Ahlstedt <kjellahl src gnome org>]

The unsigned tag '2.68.1' was created.

Tagger: Kjell Ahlstedt <kjellahlstedt gmail com>
Date: 1621530405 +0200

    2.68.1

Changes since the last tag '2.68.0':

Chun-wei Fan (8):
      g[io|lib]mmconfig.h.*: Don't dllimport on MinGW
      ustring.h: Avoid exporting classes with std::string members
      variantdbusstring.h: Don't mark classes with GLIBMM_API
      fileattributeinfo.hg: Avoid exporting classes with std::string members
      error.h Avoid exporting class deriving frm std::exception
      Don't mark the Glib::Source class with GLIBMM_API
      Clean up Visual Studio build files
      Merge branch 'std-string-msvc-fixes' into 'master'

Kjell Ahlstedt (16):
      Meson build: Use relative paths to untracked/
      docs/reference/Doxyfile.in: Remove obsolete entries
      tools/gen_scripts: Ignore gio/gwin32api-*.h
      Meson build: examples and tests: Add dependency('threads')
      Meson build: Make it possible to use glibmm as a subproject
      Add tools/defs_gen/enumextract.py
      Meson build: No implicit_include_directories
      Meson build: No implicit_include_directories
      Merge branch 'master' into 'master'
      tests/glibmm_ustring_compare: Fix so it works for C++20
      Meson build: Make quiet installations possible
      Subprojects can use meson.add_dist_script() if meson.version() >= 0.58.0
      Glib::PatternSpec: Ignore deprecation of g_pattern_match()
      Fix build as subproject without building documentation
      Add dependencies to Doxygen tag files in subprojects
      2.68.1

Magne Oestlyngen (1):
      Variant: Fix so it works with C++20