[glibmm] Created tag 2.70.0

[Kjell Ahlstedt <kjellahl src gnome org>]

The unsigned tag '2.70.0' was created.

Tagger: Kjell Ahlstedt <kjellahlstedt gmail com>
Date: 1633514962 +0200

    2.70.0

Changes since the last tag '2.68.1':

Kjell Ahlstedt (25):
      Glib::Timer: Add resume() and is_active()
      Add Glib::Environ and tests/glibmm_environ
      gmmproc, DocsParser.pm: Handle gi-docgen syntax in documentation
      Glib::ustring: Remove extraneous GLIBMM_API
      gmmproc, DocsParser.pm: Improve the handling of gi-docgen syntax
      gmmproc, DocsParser.pm: 2nd improve the handling of gi-docgen syntax
      Update gio_docs_override.xml
      Merge branch 'talisein-file-enumerator-leak' into 'master'
      Gio::ListModel::get_object(): Don't try to cast to Glib::Object
      handle-built-files.py: Specify file encoding on generated files
      Gio::AppInfo::get_all(): Use Glib::wrap_auto_interface()
      Gio::AppInfo::get_all(): Use a local TypeTraits in ListHandler
      Use GLib from the main branch in subproject
      meson.build: Check if Perl is required for building documentation
      .gitlab-ci.yml: Add dependency g++-10
      CI: Build libsigc++ only once
      CI: Don't rebuild libsigc++ if it can be pulled from the cache
      Declare some copy assignment operators deleted (=delete)
      Glib::wrap_register_init(): Don't use g_quark_from_static_string()
      CI: Switching to debian:testing
      CI: Build with g++-11 instead of g++-9
      Glib, Gio: Regenerate docs.xml and .defs files
      Glib, Gio: Add some methods for glibmm 2.70
      Glib::Binding: Fix return type from dup_source() and dup_target()
      2.70.0

talisein (1):
      fileenumerator.hg: Remove refreturn to avoid memory leak