`insert_all!` missing from list of blocked bulk operations for audit logging

Ran into a case where we were calling `insert_all!` on a model without disabling audit logging. Looks like we don't have this method on the list. We do have `insert_all` without the `!` and the only difference between them how they handle conflicts, so I think we would want both.

https://github.com/Betterment/journaled/blob/master/lib/journaled/audit_log.rb#L181-L188