c++-gtk-utils: Update to 2.2.19
Changelog:
Version 2.2.19 (27 January 2020)
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Use autoconf's TAP support for running tests (Makefile.am,
configure-gtk2.ac, configure-gtk3.ac, configure-gtk4.ac;
c++-gtk-utils/Makefile.am; docs/Makefile.am; tests/Makefile.am,
tests/extension/Makefile.am, tests/extra/Makefile.am; removed -
Makefile.decl; added - glib-tap.mk, tap-driver.sh, tap-test,
m4/glibtests.m4)
Cater for guile-3.0 declarative modules (acinclude.m4;
extension.h).
Suppress GStaticRecMutex deprecation warnings (acinclude.m4,
configure-gtk2.ac, configure-gtk3.ac, configure-gtk4.ac;
cgu_config.h.in, mutex.h).
7c58489455