Log Message:
Update ruby-sequel to 4.32.0.

=== 4.32.0 (2016-03-01)

* Use mutex for synchronizing access to association reflection cache on MRI \ 
(jeremyevans)

* Add Dataset#delete_from on MySQL, allowing deletions from multiple tables in a \ 
single query (jeremyevans) (#1146)

* Add no_auto_literal_strings extension, which makes SQL injection \ 
vulnerabilities less likely (jeremyevans)

* Add Model.default_association_options, for setting option defaults for all \ 
future associations (jeremyevans)

* Support :association_pks_nil association option in association_pks setter for \ 
determining how to handle nil (jeremyevans)

* Make association_pks setter handle empty array correctly when :delay_pks is \ 
set (jeremyevans)

* Add a setter method for one_through_one associations (jeremyevans)

* Include :remarks entry in JDBC schema parsing output, containing comments on \ 
the column (olleolleolle) (#1143)

* Support :eager_reload and :eager options to associations in \ 
tactical_eager_loading plugin (jeremyevans)

* Make tactical_eager_loading not eager load if passing proc or block to \ 
association method (jeremyevans)

* Make eager_each plugin handle eager loading for Dataset#first and similar \ 
methods (jeremyevans)