Log Message:
databases/ruby-sequel: update to 5.64.0

5.64.0 (2023-01-01)

* Make :db_type column schema entries on SQLAnywhere include precision/scale
  information (jeremyevans)

* Include :min_value and :max_value schema entries for decimal/numeric
  columns on most databases (rolftimmermans, jeremyevans) (#1975)

* Support :graph_use_association_block association option to make
  eager_graph use the association block (jeremyevans)

* Make many_through_many and many_through_one associations support
  eager_graph callbacks (jeremyevans)