Add an option to update the timestamp when a record is logically deleted

[sukumo28]

Hi
Currently, when using acts_as_paranoid to logically delete records, the timestamps (such as the updated_at column) are not updated.
From the source code, it appears that update_all is being used, hence the timestamps are not updated.
I would like to request the addition of an option to update the timestamps.
I understand that changing the column type to time will work, but it would be nice to have such an option if I want to use this gem without changing the database scheme specification.
Thank you.