2.54.0 (stable):

Glib:
* Added DBusObjectPathString and DBusSignatureString, for Variants with D-Bus object paths or D-Bus signatures,
  and add Variant specializations for Variant<Glib::DBusObjectPathString>,
  Variant<Glib::DBusSignatureString> and Variant<std::vector<Glib::DBusObjectPathString>>.
  (Kjell Ahlstedt) Bug #785700
* Variant: Add template specialization for std::tuple.
  (Alexander Rössler) Bug #777791

Gio:
* ActionGroup: Add optional action_name parameters to some signals.
  (Kjell Ahlstedt)
* Settings: Add optional key parameter to the writable_changed signal.
  (Kjell Ahlstedt)

gmmproc:
* Write signal flags to generated documentation
  (Kjell Ahlstedt) Bug #785895 (Daniel Boles)
* Write default values of properties to generated documentation
  (Kjell Ahlstedt) Bug #785895 (Daniel Boles)
* Warn for unmatched deprecations in signals and properties.
  (Kjell Ahlstedt)
* Accept curly braces in default values in _WRAP macros.
  (Kjell Ahlstedt) Bug #783216 comment #13 (Daniel Boles)
* Fix _WRAP_ENUM for enumerators with apostrophes.
  (Kjell Ahlstedt)
* Add new elements types for the docs_override:
  substitute_type_name and substitute_enumerator_name.
  (Kjell Ahlstedt) Bug #86864


2.52.1 (stable):

Gio:
* TlsDatabase: Fix memory leak in a vfunc.
  (Kjell Ahlstedt) Bug #783360

Documentation:
* Update docs of get_*_name().
  (Daniel Boles)

Build:
* MacOS: Really correct build without gdesktopinfo.
  (Kjell Ahlstedt) Bug #781947

2.52.0 (stable):

Gio:
* UnixSocketAddress::create(): Remove the default value for the type
  parameter to avoid ambiguity.