ANNOUNCE: libxfce4util 4.21.0 released

[Brian Tarricone]

libxfce4util 4.21.0 is now available for download from
  
  https://archive.xfce.org/src/xfce/libxfce4util/4.21/libxfce4util-4.21.0.tar.xz
  https://archive.xfce.org/src/xfce/libxfce4util/4.21/libxfce4util-4.21.0.tar.xz?sha1
  https://archive.xfce.org/src/xfce/libxfce4util/4.21/libxfce4util-4.21.0.tar.xz?sha256


What is libxfce4util?
=====================

Libxfce4util is used to share commonly used non-GTK utilities among the
Xfce applications.

Website: 
  https://docs.xfce.org/xfce/libxfce4util/start


Release notes for 4.21.0
========================
[Please note that this is a development release.]

- Update README after switchover to meson
- Remove autotools build
- Support XDG_STATE_HOME in xfce_resource_*()
- Remove G_GNUC_CONST
- gobject-linter: Fix use_g_steal_pointer
- gobject-linter: Fix unnecessary_null_check
- gobject-linter: Fix missing_g_begin_decls
- gobject-linter: Fix use_clear_functions
- gobject-linter: Fix matching_declare_define
- Fix -Wdiscarded-qualifiers compiler warning
- cppcheck: Fix knownConditionTrueFalse
- cppcheck: Fix allocaCalled
- Remove include guards from private headers
- cppcheck: Fix unsignedLessThanZero
- scan-build: Update false positive file after clang version bump
- systemd: Add *_with_flags methods
- I18n: Update po/LINGUAS list
- I18n: Update po/LINGUAS list
- build: Fix typo in optimization level
- I18n: Update po/LINGUAS list
- autotools-build: Add *-docs.xml.in to EXTRA_DIST
- Revert "Update README after switchover to meson"
- Update README after switchover to meson
- meson-build: Use configure_file() to generate GNU visibility files
- Translation Updates:
  Esperanto, Georgian, Lao, Occitan (post 1500), Slovenian, Vietnamese