0.20.9

Christopher Head (2):
      Fix incorrect documentation
      Re-export CancelledHandlerId

Philipp Jungkamp:
      glib: Implement ToGlibContainerFromSlice for CStr and CString
      gio: Use manual `env: &[OsString]` parameter for SubprocessLauncher::set_environ

Sebastian Dröge:
      Fix some new clippy warnings
      glib: Fix expected compiler error text for Rust 1.84
      pango: Add bindings for `Font::languages()`
      Update gir / gir-files
      Regenerate with latest gir / gir-files
      glib: Add v2_84 gobject-sys feature
      pango: Ignore FontDescription::set_features_static() and set_variations_static() for now
      gdk-pixbuf: Allow unused imports in auto-generated code
      Update versions to 0.20.9
      Update Cargo.lock

Sebastian Wiesner:
      Rewrite DBus registration example with inheritance
      Bind dbus_register vfunc
      Bind dbus_unregister vfunc
      Bind name_lost vfunc
      Use DBus errors in example

jgcodes2020:
      vector operator overloads
      matrix multiplication and transforms
      more matrix operations, quaternion operations
      cargo fmt
      fix clippy warnings

ogios:
      add_full for unix fd

quo:
      glib: Deprecate SendWeakRef::new() because implementation is unsound
      gio: Fix order of arguments to g_dbus_connection_register_object_with_closures()
      gio: Add DBus RegistrationBuilder.property()/set_property() tests