* refactor: use gin in Promise
* refactor: separate Promise impl that returns nothing
* refactor: use Promise<void> for promise that returns nothing
* fix: methods should be able to run on both browser and renderer process
* fix: should not pass base::StringPiece across threads
* refactor: no more need to use different ResolvePromise for empty Promise
* refactor: move Promise to gin_helper
* refactor: move the arg instead of const reference it
* refactor: avoid unnecessary copies of base::Value in arg
* refactor: pass-by-value in dict_util
* refactor: avoid unnecessary reference
* refactor: remove direct uses of event_emitter_deprecated.h
* refactor: remove event_emitter_deprecated.h in api::App
* refactor: use std::move to save a copy
* fix: windows and linux builds
* refactor: make util::Promise type safe when chaining in native
* fixup! refactor: make util::Promise type safe when chaining in native
* chore: remove spare brackets
* feat: show optional authors in gtk about panel
* chore: use a base::Value for about dialog options on Linux
* docs: mark 'version' as supported on Linux too
