We need to specify the value for the ATK_VERSION variable as well,
otherwise some version info of the DLL will not be set correctly.
https://bugzilla.gnome.org/show_bug.cgi?id=785802
atk_version_conf.set('ATK_BINARY_AGE', atk_binary_age)
atk_version_conf.set('ATK_INTERFACE_AGE', atk_interface_age)
atk_version_conf.set('LT_CURRENT_MINUS_AGE', '0')
+atk_version_conf.set('ATK_VERSION', meson.project_version())
atk_version_h = configure_file(input: 'atkversion.h.in',
output: 'atkversion.h',