Log Message:
databases/ruby-sequel: update to 5.66.0

5.66.0 (2023-03-01)

* Recognize SQLite error related to strict tables as a constraint violation
  when using the amalgalite adapter (jeremyevans)
* Make Dataset#count work correctly for datasets using Dataset#values
  (jeremyevans) (#1992)
* Make Dataset#count with no argument/block handle dataset with custom SQL
  using ORDER BY on MSSQL (jeremyevans)
* Make Dataset#empty? correctly handle datasets with custom SQL or using
  Dataset#values where the first value is NULL (andy-k, jeremyevans) (#1990)