fcitx-engines.mozc fails on nixos-unstable

[teto]

Issue description

Even after I tried to bump the version, it fails with

/build/source/src/dictionary/user_dictionary_util.h:119:47: note: passing argument to parameter 'storage' here
      user_dictionary::UserDictionaryStorage *storage,
                                              ^
../../dictionary/user_dictionary_session.cc:647:11: error: cannot initialize a parameter of type 'user_dictionary::UserDictionaryStorage *' with an rvalue of type 'std::unique_ptr<mozc::UserDictionaryStorage, std::default_delete<mozc::UserDictionaryStorage> >::pointer' (aka 'mozc::UserDictionaryStorage *')
          storage_.get(), dictionary_id);
          ^~~~~~~~~~~~~~
/build/source/src/dictionary/user_dictionary_util.h:119:47: note: passing argument to parameter 'storage' here
      user_dictionary::UserDictionaryStorage *storage,
                                              ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
[587/734] CXX obj/dictionary/user_dictionary.user_dictionary_session_handler.o
[588/734] CXX obj/gui/config_dialog/config_dialog_lib.roman_table_editor.o

I believe I may try to bump protobuf as well. Maybe related google/mozc#460

Steps to reproduce

Technical details

nixos-unstable from 22 April.

[teto]

fixed by mentioned PR.