databases/ruby-sequel: update to 5.60.1

5.60.1 (2022-09-02)

* Revert conversion of respond_to? to defined?, as it breaks with unused
  refinements on Ruby 2 (jeremyevans) (#1919)

5.60.0 (2022-09-01)

* Support arbitrary expressions for date_arithmetic interval values on
  PostgreSQL 9.4+ (jeremyevans)

* Support native IS DISTINCT FROM on SQLite 3.39+ instead of emulating
  support in the is_distinct_from extension (jeremyevans)

* Support HAVING without GROUP BY on SQLite 3.39+ (jeremyevans)

* Convert most respond_to? calls to equivalent defined? for better
  performance (jeremyevans)

(taca)