Add Exception#cause feature to changelog.
Add Exception#cause feature to changelog.

honeybadger-io/honeybadger-ruby,Workable/honeybadger-ruby,kylerippey/honeybadger-ruby,kylerippey/honeybadger-ruby,Workable/honeybadger-ruby,honeybadger-io/honeybadger-ruby,gtd/honeybadger-ruby,gtd/honeybadger-ruby